diff --git a/active_directory/tests/test_active_directory.py b/active_directory/tests/test_active_directory.py
deleted file mode 100644
index 4db327b084fbc..0000000000000
--- a/active_directory/tests/test_active_directory.py
+++ /dev/null
@@ -1,34 +0,0 @@
-# (C) Datadog, Inc. 2010-present
-# All rights reserved
-# Licensed under Simplified BSD License (see LICENSE)
-import pytest
-from datadog_test_libs.win.pdh_mocks import initialize_pdh_tests, pdh_mocks_fixture  # noqa: F401
-
-from datadog_checks.active_directory import ActiveDirectoryCheck
-from datadog_checks.active_directory.metrics import DEFAULT_COUNTERS
-from datadog_checks.base.stubs.aggregator import AggregatorStub  # noqa: F401
-from datadog_checks.dev.testing import requires_py2
-from datadog_checks.dev.utils import get_metadata_metrics
-
-from .common import CHECK_NAME, MINIMAL_INSTANCE
-
-pytestmark = [requires_py2, pytest.mark.usefixtures('pdh_mocks_fixture')]
-
-
-@pytest.fixture(autouse=True)
-def setup_check():
-    initialize_pdh_tests()
-
-
-def test_basic_check(aggregator, dd_run_check):
-    # type: (AggregatorStub) -> None
-    instance = MINIMAL_INSTANCE
-    check = ActiveDirectoryCheck(CHECK_NAME, {}, [instance])
-    dd_run_check(check)
-
-    for metric_def in DEFAULT_COUNTERS:
-        metric = metric_def[3]
-        aggregator.assert_metric(metric, tags=None, count=1)
-
-    aggregator.assert_all_metrics_covered()
-    aggregator.assert_metrics_using_metadata(get_metadata_metrics())
diff --git a/active_directory/tests/test_unit.py b/active_directory/tests/test_unit.py
index 66351740a51af..97aad334c3805 100644
--- a/active_directory/tests/test_unit.py
+++ b/active_directory/tests/test_unit.py
@@ -4,13 +4,10 @@
 from datadog_checks.active_directory import ActiveDirectoryCheck
 from datadog_checks.active_directory.metrics import DEFAULT_COUNTERS
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 
 from .common import PERFORMANCE_OBJECTS
 
-pytestmark = [requires_py3]
-
 
 def test(aggregator, dd_default_hostname, dd_run_check, mock_performance_objects):
     mock_performance_objects(PERFORMANCE_OBJECTS)
diff --git a/aerospike/tests/test_aerospike.py b/aerospike/tests/test_aerospike.py
index b10878bbd7916..ecd3a0a688e4a 100644
--- a/aerospike/tests/test_aerospike.py
+++ b/aerospike/tests/test_aerospike.py
@@ -8,7 +8,6 @@
 
 from datadog_checks.aerospike import AerospikeCheck
 from datadog_checks.base import AgentCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 
 from .common import (
@@ -70,7 +69,6 @@ def test_e2e(dd_agent_check, instance):
     aggregator.assert_metrics_using_metadata(get_metadata_metrics())
 
 
-@requires_py3
 @pytest.mark.e2e
 def test_openmetrics_e2e(dd_agent_check, instance_openmetrics_v2):
     version_parts = [int(p) for p in VERSION.split('.')]
@@ -93,7 +91,6 @@ def test_openmetrics_e2e(dd_agent_check, instance_openmetrics_v2):
     aggregator.assert_metrics_using_metadata(get_metadata_metrics(), check_submission_type=True)
 
 
-@requires_py3
 @pytest.mark.integration
 def test_metrics_warning(dd_run_check, instance_openmetrics_v2):
     instance_openmetrics_v2['metrics'] = ['migrate_rx_objs', 'migrate_tx_objs']
diff --git a/aerospike/tests/test_unit_openmetricsv2.py b/aerospike/tests/test_unit_openmetricsv2.py
index f12312b46ba2c..d82f4607ff7d8 100644
--- a/aerospike/tests/test_unit_openmetricsv2.py
+++ b/aerospike/tests/test_unit_openmetricsv2.py
@@ -6,12 +6,11 @@
 import pytest
 
 from datadog_checks.aerospike import AerospikeCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 
 from .common import EXPECTED_PROMETHEUS_METRICS, EXPECTED_PROMETHEUS_METRICS_5_6, HERE, PROMETHEUS_XDR_METRICS
 
-pytestmark = [pytest.mark.unit, requires_py3]
+pytestmark = [pytest.mark.unit]
 
 
 def get_fixture_path(filename):
diff --git a/aspdotnet/tests/test_unit.py b/aspdotnet/tests/test_unit.py
index c660f6efe6d20..af6dcb44eb89e 100644
--- a/aspdotnet/tests/test_unit.py
+++ b/aspdotnet/tests/test_unit.py
@@ -3,13 +3,10 @@
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.aspdotnet import AspdotnetCheck
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 
 from .common import ASP_APP_INSTANCES, ASP_APP_METRICS, ASP_METRICS, PERFORMANCE_OBJECTS
 
-pytestmark = [requires_py3]
-
 
 def test(aggregator, dd_default_hostname, dd_run_check, mock_performance_objects):
     mock_performance_objects(PERFORMANCE_OBJECTS)
diff --git a/cockroachdb/tests/test_bench.py b/cockroachdb/tests/test_bench.py
index f975b198ff7a5..da082936da0de 100644
--- a/cockroachdb/tests/test_bench.py
+++ b/cockroachdb/tests/test_bench.py
@@ -4,9 +4,8 @@
 import pytest
 
 from datadog_checks.cockroachdb import CockroachdbCheck
-from datadog_checks.dev.testing import requires_py3
 
-pytestmark = [pytest.mark.usefixtures('dd_environment'), requires_py3]
+pytestmark = [pytest.mark.usefixtures('dd_environment')]
 
 
 def test_run(benchmark, dd_run_check, instance):
diff --git a/cockroachdb/tests/test_e2e.py b/cockroachdb/tests/test_e2e.py
index 9f2c7689b6c1d..480b8c226a1df 100644
--- a/cockroachdb/tests/test_e2e.py
+++ b/cockroachdb/tests/test_e2e.py
@@ -1,12 +1,10 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from .common import assert_metrics
 
 
-@requires_py3
 def test_metrics(dd_agent_check, instance):
     aggregator = dd_agent_check(instance, rate=True)
     assert_metrics(aggregator)
diff --git a/cockroachdb/tests/test_integration.py b/cockroachdb/tests/test_integration.py
index ec75d2f2e7e28..cd018dcfa8254 100644
--- a/cockroachdb/tests/test_integration.py
+++ b/cockroachdb/tests/test_integration.py
@@ -5,12 +5,11 @@
 
 from datadog_checks.base.constants import ServiceCheck
 from datadog_checks.cockroachdb import CockroachdbCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import assert_service_checks, get_metadata_metrics
 
 from .common import COCKROACHDB_VERSION, assert_metrics
 
-pytestmark = [pytest.mark.usefixtures('dd_environment'), requires_py3]
+pytestmark = [pytest.mark.usefixtures('dd_environment')]
 
 
 def test_metrics(aggregator, instance, dd_run_check):
diff --git a/cockroachdb/tests/test_unit.py b/cockroachdb/tests/test_unit.py
index bb87ed749ebc6..88d3ea262017d 100644
--- a/cockroachdb/tests/test_unit.py
+++ b/cockroachdb/tests/test_unit.py
@@ -6,7 +6,6 @@
 from datadog_checks.base.constants import ServiceCheck
 from datadog_checks.cockroachdb import CockroachdbCheck
 from datadog_checks.cockroachdb.metrics import METRIC_MAP, OMV2_METRIC_MAP
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import assert_service_checks, get_metadata_metrics
 
 from .common import (
@@ -23,8 +22,6 @@
     get_fixture_path,
 )
 
-pytestmark = [requires_py3]
-
 
 # The test below is designed to collect metrics that are not exposed in our e2e environment.
 # To collect security metrics, we need to enable TLS and provide certificates. In the future,
diff --git a/datadog_checks_base/tests/base/checks/logs/crawler/test_base.py b/datadog_checks_base/tests/base/checks/logs/crawler/test_base.py
index cc7a6aabfc740..504cdeb906b38 100644
--- a/datadog_checks_base/tests/base/checks/logs/crawler/test_base.py
+++ b/datadog_checks_base/tests/base/checks/logs/crawler/test_base.py
@@ -1,9 +1,6 @@
 # (C) Datadog, Inc. 2024-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
-
-pytestmark = [requires_py3]
 
 
 # TODO: Remove lazy imports and `.format` calls when we drop support for Python 2
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_bench.py b/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_bench.py
index 73ca9e423c233..c540f7d47d8e7 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_bench.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_bench.py
@@ -7,12 +7,9 @@
 
 from datadog_checks.base import OpenMetricsBaseCheck
 from datadog_checks.dev import get_here
-from datadog_checks.dev.testing import requires_py3
 
 from ..bench_utils import AMAZON_MSK_JMX_METRICS_MAP, AMAZON_MSK_JMX_METRICS_OVERRIDES
 
-pytestmark = [requires_py3]
-
 HERE = get_here()
 FIXTURE_PATH = os.path.abspath(os.path.join(os.path.dirname(HERE), '..', '..', '..', 'fixtures', 'prometheus'))
 
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_compat_scraper.py b/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_compat_scraper.py
index c5ade8a74c461..b053495cb8f25 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_compat_scraper.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_legacy/test_compat_scraper.py
@@ -3,12 +3,8 @@
 # Licensed under a 3-clause BSD style license (see LICENSE)
 import pytest
 
-from datadog_checks.dev.testing import requires_py3
-
 from .utils import get_legacy_check
 
-pytestmark = [requires_py3]
-
 
 class TestRawMetricPrefix:
     def test_not_string(self, dd_run_check):
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_bench.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_bench.py
index e1c03e0ac08fc..678651f28f5ce 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_bench.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_bench.py
@@ -7,12 +7,9 @@
 
 from datadog_checks.base import OpenMetricsBaseCheckV2
 from datadog_checks.dev import get_here
-from datadog_checks.dev.testing import requires_py3
 
 from ..bench_utils import AMAZON_MSK_JMX_METRICS_MAP, AMAZON_MSK_JMX_METRICS_OVERRIDES
 
-pytestmark = [requires_py3]
-
 HERE = get_here()
 FIXTURE_PATH = os.path.abspath(os.path.join(os.path.dirname(HERE), '..', '..', '..', 'fixtures', 'prometheus'))
 
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_config.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_config.py
index 029d7757c2454..0f3f6b7812e68 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_config.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_config.py
@@ -3,12 +3,8 @@
 # Licensed under a 3-clause BSD style license (see LICENSE)
 import pytest
 
-from datadog_checks.dev.testing import requires_py3
-
 from .utils import get_check
 
-pytestmark = [requires_py3]
-
 
 class TestPrometheusEndpoint:
     def test_not_string(self, dd_run_check):
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_first_scrape_handler.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_first_scrape_handler.py
index 059fe10591942..1a710a8243bf9 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_first_scrape_handler.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_first_scrape_handler.py
@@ -4,13 +4,9 @@
 import pytest
 
 from datadog_checks.base.stubs import datadog_agent
-from datadog_checks.dev.testing import requires_py3
 
 from .utils import get_check
 
-pytestmark = [requires_py3]
-
-
 test_use_process_start_time_data = """\
 # HELP go_memstats_alloc_bytes_total Total number of bytes allocated, even if freed.
 # TYPE go_memstats_alloc_bytes_total counter
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_interface.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_interface.py
index 2e9ff176bd35d..d6071cf0226e5 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_interface.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_interface.py
@@ -3,12 +3,9 @@
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base import OpenMetricsBaseCheckV2
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 
 from .utils import get_check
 
-pytestmark = [requires_py3]
-
 
 def test_default_config(aggregator, dd_run_check, mock_http_response):
     class Check(OpenMetricsBaseCheckV2):
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_options.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_options.py
index 597aeda01a1b3..6ac560760069e 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_options.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_options.py
@@ -5,12 +5,9 @@
 from mock import Mock
 
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 
 from .utils import get_check
 
-pytestmark = [requires_py3]
-
 
 class TestNamespace:
     def test(self, aggregator, dd_run_check, mock_http_response):
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter.py
index 714f882d7d274..922ee631c6304 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test_basic(aggregator, dd_run_check, mock_http_response):
     """
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter_gauge.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter_gauge.py
index e78ffe785a5cb..ae1a6a36203b8 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter_gauge.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_counter_gauge.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test(aggregator, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_gauge.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_gauge.py
index a6e9abeadb1e8..bf0398e5d5347 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_gauge.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_gauge.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test_basic(aggregator, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_histogram.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_histogram.py
index 38785892e6c90..fc0bfd0ff76a7 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_histogram.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_histogram.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def assert_metric_counts(aggregator, payload):
     num_bucket_metrics = 0
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_metadata.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_metadata.py
index b18a9971a6d43..de5228d6ec77b 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_metadata.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_metadata.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test_basic(aggregator, datadog_agent, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_native_dynamic.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_native_dynamic.py
index cc3e34b668f05..3ef2462a8a6d5 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_native_dynamic.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_native_dynamic.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test_basic(aggregator, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_rate.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_rate.py
index dc253f82bcb69..d5912078a05a6 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_rate.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_rate.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test(aggregator, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_service_check.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_service_check.py
index 51d15ee69965c..d1764ac84d423 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_service_check.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_service_check.py
@@ -2,14 +2,9 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test_known(aggregator, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_summary.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_summary.py
index 2a941c065a50b..37e5b79ebae2c 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_summary.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_summary.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def assert_metric_counts(aggregator, payload):
     num_quantile_metrics = 0
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_temporal_percent.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_temporal_percent.py
index 49eeeb6ca3841..23140edb50b29 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_temporal_percent.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_temporal_percent.py
@@ -1,14 +1,9 @@
 # (C) Datadog, Inc. 2020-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test_named(aggregator, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_time_elapsed.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_time_elapsed.py
index 4366fb51c0f85..f23c446eaa229 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_time_elapsed.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_time_elapsed.py
@@ -2,14 +2,9 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.utils.time import get_timestamp
-from datadog_checks.dev.testing import requires_py3
 
 from ..utils import get_check
 
-pytestmark = [
-    requires_py3,
-]
-
 
 def test(aggregator, dd_run_check, mock_http_response):
     mock_http_response(
diff --git a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_type_override.py b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_type_override.py
index ca79de6b0e176..a1fa39e6bfedc 100644
--- a/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_type_override.py
+++ b/datadog_checks_base/tests/base/checks/openmetrics/test_v2/test_transformers/test_type_override.py
@@ -3,12 +3,8 @@
 # Licensed under a 3-clause BSD style license (see LICENSE)
 import pytest
 
-from datadog_checks.dev.testing import requires_py3
-
 from ..utils import get_check
 
-pytestmark = [requires_py3]
-
 
 @pytest.mark.parametrize(
     'metric_type',
diff --git a/datadog_checks_base/tests/base/checks/test_agent_check.py b/datadog_checks_base/tests/base/checks/test_agent_check.py
index 244a041582b26..aa478ceca3e17 100644
--- a/datadog_checks_base/tests/base/checks/test_agent_check.py
+++ b/datadog_checks_base/tests/base/checks/test_agent_check.py
@@ -13,7 +13,6 @@
 
 from datadog_checks.base import AgentCheck, to_native_string
 from datadog_checks.base import __version__ as base_package_version
-from datadog_checks.dev.testing import requires_py3
 
 
 def test_instance():
@@ -1068,7 +1067,6 @@ def check(self, _):
         assert check.initialize.call_count == 2
 
 
-@requires_py3
 def test_load_configuration_models(dd_run_check, mocker):
     instance = {'endpoint': 'url', 'tags': ['foo:bar'], 'proxy': {'http': 'http://1.2.3.4:9000'}}
     init_config = {'proxy': {'https': 'https://1.2.3.4:4242'}}
@@ -1111,7 +1109,6 @@ def __init__(self, **kwargs):
             pass
 
 
-@requires_py3
 @pytest.mark.parametrize(
     "check_instance_config, default_instance_config, log_lines, unknown_options",
     [
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_aggregation.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_aggregation.py
index 9e8731b030593..d9967d61fef73 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_aggregation.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_aggregation.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_single_instance(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_config.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_config.py
index 3344b237efe41..d03346346b373 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_config.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_config.py
@@ -5,11 +5,11 @@
 
 import pytest
 
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 @pytest.fixture(autouse=True)
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_filter.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_filter.py
index 71939b239bee7..443d3fdbee576 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_filter.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_filter.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_include(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_health.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_health.py
index 8d619380498e0..90d9764224a69 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_health.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_health.py
@@ -4,11 +4,11 @@
 import logging
 
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_disable(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_integration.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_integration.py
index 34a589f04c5c2..35b6ada26b9d2 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_integration.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_integration.py
@@ -6,11 +6,11 @@
 import mock
 
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import SERVER, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test(aggregator, dd_run_check):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_legacy_support.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_legacy_support.py
index 1c8a96c36cf90..69b186d047ed9 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_legacy_support.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_legacy_support.py
@@ -4,7 +4,7 @@
 import logging
 
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import GLOBAL_TAGS, SERVER
 
@@ -14,7 +14,7 @@
 except Exception:
     PerfCountersBaseCheckWithLegacySupport = object
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 class CustomCheck(PerfCountersBaseCheckWithLegacySupport):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_localization.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_localization.py
index e3e9b384bec05..cdb417185adb0 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_localization.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_localization.py
@@ -4,11 +4,11 @@
 import mock
 
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import GLOBAL_TAGS, SERVER, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_default(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_refresh.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_refresh.py
index 146dcce4f64db..df0b1e9c0eacb 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_refresh.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_refresh.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_detection(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_subclass.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_subclass.py
index 01da8468ea4f2..38b5e367e98a0 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/test_subclass.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/test_subclass.py
@@ -2,7 +2,7 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from .utils import GLOBAL_TAGS, SERVER
 
@@ -14,7 +14,7 @@
     PerfCountersBaseCheck = object
     PerfObject = object
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 class CustomCheck(PerfCountersBaseCheck):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_count.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_count.py
index d8c6fe4d7e604..d00026bc25558 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_count.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_count.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from ..utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_gauge.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_gauge.py
index cf47ca5777107..a7c10e4ac7647 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_gauge.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_gauge.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from ..utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_explicit(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_monotonic_count.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_monotonic_count.py
index 288b9789666c2..c66b2635fcfee 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_monotonic_count.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_monotonic_count.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from ..utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_rate.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_rate.py
index 323bfc2eb1a41..3a0957b43ce6d 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_rate.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_rate.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from ..utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_service_check.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_service_check.py
index 69c2402d6401e..12815bfecc6f1 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_service_check.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_service_check.py
@@ -2,11 +2,11 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from ..utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_known(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_temporal_percent.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_temporal_percent.py
index f666fc681d9bd..59e772960bd71 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_temporal_percent.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_temporal_percent.py
@@ -1,11 +1,11 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from ..utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test_named(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_time_elapsed.py b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_time_elapsed.py
index 4380dc4e5024b..7b191063f1ea1 100644
--- a/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_time_elapsed.py
+++ b/datadog_checks_base/tests/base/checks/windows/perf_counters/transformers/test_time_elapsed.py
@@ -2,11 +2,11 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.utils.time import get_timestamp
-from datadog_checks.dev.testing import requires_py3, requires_windows
+from datadog_checks.dev.testing import requires_windows
 
 from ..utils import GLOBAL_TAGS, get_check
 
-pytestmark = [requires_py3, requires_windows]
+pytestmark = [requires_windows]
 
 
 def test(aggregator, dd_run_check, mock_performance_objects):
diff --git a/datadog_checks_base/tests/base/utils/replay/test_check.py b/datadog_checks_base/tests/base/utils/replay/test_check.py
index 2723d4b7dc4ec..7866db15ad5de 100644
--- a/datadog_checks_base/tests/base/utils/replay/test_check.py
+++ b/datadog_checks_base/tests/base/utils/replay/test_check.py
@@ -7,9 +7,6 @@
 
 from datadog_checks.base import AgentCheck
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
-
-pytestmark = [requires_py3]
 
 
 class ReplayCheck(AgentCheck):
diff --git a/datadog_checks_base/tests/models/test_interface.py b/datadog_checks_base/tests/models/test_interface.py
index 3d189482e715a..781dcf4e0aa14 100644
--- a/datadog_checks_base/tests/models/test_interface.py
+++ b/datadog_checks_base/tests/models/test_interface.py
@@ -5,15 +5,12 @@
 from six import PY3
 
 from datadog_checks.base import AgentCheck
-from datadog_checks.dev.testing import requires_py3
 
 if PY3:
     from .config_models import ConfigMixin
 else:
     ConfigMixin = object
 
-pytestmark = [requires_py3]
-
 
 class Check(AgentCheck, ConfigMixin):
     def check(self, _):
diff --git a/datadog_checks_base/tests/models/test_types.py b/datadog_checks_base/tests/models/test_types.py
index c4ccc0f07b745..c0747072930c0 100644
--- a/datadog_checks_base/tests/models/test_types.py
+++ b/datadog_checks_base/tests/models/test_types.py
@@ -1,9 +1,6 @@
 # (C) Datadog, Inc. 2021-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-from datadog_checks.dev.testing import requires_py3
-
-pytestmark = [requires_py3]
 
 
 def test_make_immutable():
diff --git a/datadog_checks_dev/datadog_checks/dev/conditions.py b/datadog_checks_dev/datadog_checks/dev/conditions.py
index 85d8ea474bc9d..d4c228c259780 100644
--- a/datadog_checks_dev/datadog_checks/dev/conditions.py
+++ b/datadog_checks_dev/datadog_checks/dev/conditions.py
@@ -6,9 +6,7 @@
 import time
 from contextlib import closing
 from typing import Callable, Dict, List, Tuple, Union  # noqa: F401
-
-from six import string_types
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 
 from .errors import RetryError
 from .structures import LazyFunction
@@ -69,7 +67,7 @@ def __init__(
         wait=1,  # type: int
         send_request=None,
     ):
-        self.endpoints = [endpoints] if isinstance(endpoints, string_types) else endpoints
+        self.endpoints = [endpoints] if isinstance(endpoints, str) else endpoints
         self.timeout = timeout
         self.attempts = attempts
         self.wait = wait
@@ -131,12 +129,10 @@ def __init__(
         if not (self.stdout or self.stderr):
             raise ValueError('Must capture stdout, stderr, or both.')
 
-        if isinstance(patterns, string_types):
+        if isinstance(patterns, str):
             patterns = [patterns]
 
-        self.patterns = [
-            re.compile(pattern, re.M) if isinstance(pattern, string_types) else pattern for pattern in patterns
-        ]
+        self.patterns = [re.compile(pattern, re.M) if isinstance(pattern, str) else pattern for pattern in patterns]
 
         if matches == 'all':
             self.matches = len(patterns)
diff --git a/datadog_checks_dev/datadog_checks/dev/docker.py b/datadog_checks_dev/datadog_checks/dev/docker.py
index 044f05b9848f2..cf62dfd4c66aa 100644
--- a/datadog_checks_dev/datadog_checks/dev/docker.py
+++ b/datadog_checks_dev/datadog_checks/dev/docker.py
@@ -4,9 +4,7 @@
 import os
 from contextlib import contextmanager
 from typing import Iterator  # noqa: F401
-
-from six import string_types
-from six.moves.urllib.parse import urlparse
+from urllib.parse import urlparse
 
 from .conditions import CheckDockerLogs
 from .env import environment_run, get_state, save_state
@@ -168,7 +166,7 @@ def docker_run(
         raise TypeError('You must select either a compose file or a custom setup callable, not both.')
 
     if compose_file is not None:
-        if not isinstance(compose_file, string_types):
+        if not isinstance(compose_file, str):
             raise TypeError('The path to the compose file is not a string: {}'.format(repr(compose_file)))
 
         set_up = ComposeFileUp(compose_file, build=build, service_name=service_name)
diff --git a/datadog_checks_dev/datadog_checks/dev/fs.py b/datadog_checks_dev/datadog_checks/dev/fs.py
index c715d2ed466ff..aab0ca507ff35 100644
--- a/datadog_checks_dev/datadog_checks/dev/fs.py
+++ b/datadog_checks_dev/datadog_checks/dev/fs.py
@@ -11,31 +11,19 @@
 from contextlib import contextmanager
 from io import open
 from tempfile import mkdtemp
-
-from six import PY3, text_type
-from six.moves.urllib.request import urlopen
+from urllib.request import urlopen
 
 from .structures import EnvVars
 
-if PY3:
-
-    def write_file(file, contents, encoding='utf-8'):
-        with open(file, 'w', encoding=encoding) as f:
-            f.write(contents)
 
-    def write_file_lines(file, lines, encoding='utf-8'):
-        with open(file, 'w', encoding=encoding) as f:
-            f.writelines(lines)
-
-else:
+def write_file(file, contents, encoding='utf-8'):
+    with open(file, 'w', encoding=encoding) as f:
+        f.write(contents)
 
-    def write_file(file, contents, encoding='utf-8'):
-        with open(file, 'w', encoding=encoding) as f:
-            f.write(text_type(contents))
 
-    def write_file_lines(file, lines, encoding='utf-8'):
-        with open(file, 'w', encoding=encoding) as f:
-            f.writelines(text_type(line) for line in lines)
+def write_file_lines(file, lines, encoding='utf-8'):
+    with open(file, 'w', encoding=encoding) as f:
+        f.writelines(lines)
 
 
 def dir_exists(d):
diff --git a/datadog_checks_dev/datadog_checks/dev/kind.py b/datadog_checks_dev/datadog_checks/dev/kind.py
index 3bd61ab8ef85d..f0a7cda5d13f5 100644
--- a/datadog_checks_dev/datadog_checks/dev/kind.py
+++ b/datadog_checks_dev/datadog_checks/dev/kind.py
@@ -2,9 +2,9 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from contextlib import contextmanager
+from shutil import which
 
 import pytest
-from six import PY3
 
 from .env import environment_run
 from .fs import create_file, file_exists, path_join
@@ -12,11 +12,6 @@
 from .subprocess import run_command
 from .utils import get_active_env, get_current_check_name
 
-if PY3:
-    from shutil import which
-else:
-    from shutilwhich import which
-
 
 @contextmanager
 def kind_run(
diff --git a/datadog_checks_dev/datadog_checks/dev/plugin/pytest.py b/datadog_checks_dev/datadog_checks/dev/plugin/pytest.py
index 2345e6013cf57..f9eaaf19b38a0 100644
--- a/datadog_checks_dev/datadog_checks/dev/plugin/pytest.py
+++ b/datadog_checks_dev/datadog_checks/dev/plugin/pytest.py
@@ -6,14 +6,12 @@
 import json
 import os
 import re
-import warnings
 from base64 import urlsafe_b64encode
 from collections import namedtuple  # Not using dataclasses for Py2 compatibility
 from io import open
 from typing import Dict, List, Optional, Tuple  # noqa: F401
 
 import pytest
-from six import PY2, ensure_text
 
 from .._env import (
     E2E_FIXTURE_NAME,
@@ -138,7 +136,7 @@ def dd_environment_runner(request):
         # Exit testing and pass data back up to command
         if E2E_RESULT_FILE in os.environ:
             with open(os.environ[E2E_RESULT_FILE], 'w', encoding='utf-8') as f:
-                f.write(ensure_text(json.dumps(data)))
+                f.write(json.dumps(data))
 
             # Rather than exiting we skip every test to avoid the following output:
             # !!!!!!!!!! _pytest.outcomes.Exit: !!!!!!!!!!
@@ -391,18 +389,6 @@ def pytest_configure(config):
 def pytest_addoption(parser):
     parser.addoption("--run-latest-metrics", action="store_true", default=False, help="run check_metrics tests")
 
-    if PY2:
-        # Add dummy memray options to make it possible to run memray with `ddev test --memray <integration>`
-        # in both py2 and 3 environments. In py2 the option is simply ignored, see pytest_collection_modifyitems.
-        # In py3 the option enables the memray plugin.
-        parser.addoption("--memray", action="store_true", default=False, help="Dummy parameter for memray")
-        parser.addoption(
-            "--hide-memray-summary",
-            action="store_true",
-            default=False,
-            help="Dummy parameter for memray to hide the summary",
-        )
-
 
 def pytest_collection_modifyitems(config, items):
     # at test collection time, this function gets called by pytest, see:
@@ -412,20 +398,12 @@ def pytest_collection_modifyitems(config, items):
         # --run-check-metrics given in cli: do not skip slow tests
         return
 
-    if PY2:
-        for option in ("--memray",):
-            if config.getoption(option):
-                warnings.warn(  # noqa: B028
-                    "`{}` option ignored as it's not supported for py2 environments.".format(option)
-                )  # noqa: B028, E501
-
     skip_latest_metrics = pytest.mark.skip(reason="need --run-latest-metrics option to run")
     for item in items:
         if "latest_metrics" in item.keywords:
             item.add_marker(skip_latest_metrics)
 
-        # In Python 2 we're using a much older version of pytest where the Item interface is different.
-        item_path = item.fspath if PY2 else item.path
+        item_path = item.path
         if item_path is None:
             continue
         for ttype in TEST_TYPES:
diff --git a/datadog_checks_dev/datadog_checks/dev/ssh_tunnel.py b/datadog_checks_dev/datadog_checks/dev/ssh_tunnel.py
index 77f8f7449053a..b5340b09a7d11 100644
--- a/datadog_checks_dev/datadog_checks/dev/ssh_tunnel.py
+++ b/datadog_checks_dev/datadog_checks/dev/ssh_tunnel.py
@@ -4,21 +4,16 @@
 from __future__ import absolute_import
 
 import os
+import subprocess
 from contextlib import contextmanager
 
 import psutil
-from six import PY3
 
 from .conditions import WaitForPortListening
 from .env import environment_run
 from .structures import LazyFunction, TempDir
 from .utils import ON_WINDOWS, find_free_port, get_ip
 
-if PY3:
-    import subprocess
-else:
-    import subprocess32 as subprocess
-
 PID_FILE = 'ssh.pid'
 
 
diff --git a/datadog_checks_dev/datadog_checks/dev/subprocess.py b/datadog_checks_dev/datadog_checks/dev/subprocess.py
index 01d3afe513459..9dd7aae87b2d8 100644
--- a/datadog_checks_dev/datadog_checks/dev/subprocess.py
+++ b/datadog_checks_dev/datadog_checks/dev/subprocess.py
@@ -8,8 +8,6 @@
 from subprocess import Popen
 from tempfile import TemporaryFile
 
-from six import string_types
-
 from .errors import SubprocessError
 from .utils import NEED_SHELL, ON_WINDOWS, mock_context_manager
 
@@ -42,7 +40,7 @@ def run_command(command, capture=None, check=False, encoding='utf-8', shell=Fals
     if shell == 'detect':
         shell = NEED_SHELL
 
-    if isinstance(command, string_types) and not ON_WINDOWS:
+    if isinstance(command, str) and not ON_WINDOWS:
         command = shlex.split(command)
 
     if capture:
diff --git a/datadog_checks_dev/datadog_checks/dev/terraform.py b/datadog_checks_dev/datadog_checks/dev/terraform.py
index 11a59fc8c23a5..7720b1a1d1702 100644
--- a/datadog_checks_dev/datadog_checks/dev/terraform.py
+++ b/datadog_checks_dev/datadog_checks/dev/terraform.py
@@ -8,18 +8,12 @@
 from contextlib import contextmanager
 
 import pytest
-from six import PY3
 
 from .env import environment_run
 from .fs import chdir, copy_dir_contents, copy_path, get_here, path_join
 from .structures import LazyFunction, TempDir
 from .subprocess import run_command
 
-if PY3:
-    from shutil import which
-else:
-    from shutilwhich import which
-
 TEMPLATES_DIR = path_join(get_here(), 'tooling', 'templates', 'terraform')
 
 
@@ -57,7 +51,7 @@ def terraform_run(directory, sleep=None, endpoints=None, conditions=None, env_va
         wrappers (list[callable]):
             A list of context managers to use during execution
     """
-    if not which('terraform'):
+    if not shutil.which('terraform'):
         pytest.skip('Terraform not available')
 
     set_up = TerraformUp(directory)
diff --git a/datadog_checks_dev/datadog_checks/dev/testing.py b/datadog_checks_dev/datadog_checks/dev/testing.py
index 090cff1c9296b..437e873aaccd2 100644
--- a/datadog_checks_dev/datadog_checks/dev/testing.py
+++ b/datadog_checks_dev/datadog_checks/dev/testing.py
@@ -5,13 +5,9 @@
 """ This module contains test annotations
 """
 import pytest
-from six import PY2
 
 from .utils import ON_MACOS, ON_WINDOWS
 
 requires_windows = pytest.mark.skipif(not ON_WINDOWS, reason='Requires Windows')
 requires_linux = pytest.mark.skipif(ON_MACOS or ON_WINDOWS, reason='Requires Linux')
 requires_unix = pytest.mark.skipif(ON_WINDOWS, reason='Requires Linux or macOS')
-
-requires_py2 = pytest.mark.skipif(not PY2, reason='Test only available on Python 2')
-requires_py3 = pytest.mark.skipif(PY2, reason='Test only available on Python 3')
diff --git a/datadog_checks_dev/datadog_checks/dev/utils.py b/datadog_checks_dev/datadog_checks/dev/utils.py
index 71602de528ba4..d4ffd2ce66361 100644
--- a/datadog_checks_dev/datadog_checks/dev/utils.py
+++ b/datadog_checks_dev/datadog_checks/dev/utils.py
@@ -13,9 +13,9 @@
 import socket
 from contextlib import closing, contextmanager
 from io import open
+from urllib.request import urlopen
 
 import yaml
-from six.moves.urllib.request import urlopen
 
 from .ci import running_on_ci, running_on_gh_actions, running_on_windows_ci  # noqa: F401
 from .fs import basepath, file_exists, get_parent_dir, path_join, read_file
diff --git a/datadog_checks_dev/pyproject.toml b/datadog_checks_dev/pyproject.toml
index e9e8f703c9281..9df85c415a22b 100644
--- a/datadog_checks_dev/pyproject.toml
+++ b/datadog_checks_dev/pyproject.toml
@@ -43,7 +43,6 @@ dependencies = [
     "pytest-mock",
     "pyyaml>=5.4.1",
     "requests>=2.22.0",
-    "six",
     "tenacity",
 ]
 dynamic = [
diff --git a/dotnetclr/tests/e2e_test.py b/dotnetclr/tests/e2e_test.py
index 11526f7935d7c..f75b1ab2ce7c4 100644
--- a/dotnetclr/tests/e2e_test.py
+++ b/dotnetclr/tests/e2e_test.py
@@ -3,15 +3,12 @@
 # Licensed under a 3-clause BSD style license (see LICENSE)
 import pytest
 
-from datadog_checks.dev.testing import requires_py3
-
 from .common import MINIMAL_INSTANCE
 
 pytestmark = pytest.mark.e2e
 
 
 @pytest.mark.flaky
-@requires_py3
 def test(dd_agent_check):
     from datadog_checks.dotnetclr.check import DotnetclrCheckV2
 
diff --git a/dotnetclr/tests/test_dotnetclr.py b/dotnetclr/tests/test_dotnetclr.py
deleted file mode 100644
index 0bfd9dc8e063c..0000000000000
--- a/dotnetclr/tests/test_dotnetclr.py
+++ /dev/null
@@ -1,32 +0,0 @@
-# (C) Datadog, Inc. 2010-present
-# All rights reserved
-# Licensed under Simplified BSD License (see LICENSE)
-import pytest
-from datadog_test_libs.win.pdh_mocks import initialize_pdh_tests, pdh_mocks_fixture  # noqa: F401
-
-from datadog_checks.dev.testing import requires_py2
-from datadog_checks.dotnetclr import DotnetclrCheck
-from datadog_checks.dotnetclr.dotnetclr import DEFAULT_COUNTERS
-
-from .common import INSTANCES, MINIMAL_INSTANCE
-
-pytestmark = [requires_py2, pytest.mark.usefixtures('pdh_mocks_fixture')]
-
-
-@pytest.fixture(autouse=True)
-def setup_check():
-    initialize_pdh_tests()
-
-
-@pytest.mark.integration
-def test_basic_check(aggregator, dd_run_check):
-    instance = MINIMAL_INSTANCE
-    c = DotnetclrCheck('dotnetclr', {}, [instance])
-    dd_run_check(c)
-
-    for metric_def in DEFAULT_COUNTERS:
-        metric = metric_def[3]
-        for inst in INSTANCES:
-            aggregator.assert_metric(metric, tags=["instance:%s" % inst], count=1)
-
-    assert aggregator.metrics_asserted_pct == 100.0
diff --git a/dotnetclr/tests/test_unit.py b/dotnetclr/tests/test_unit.py
index 1b0ae0615793f..326a0a3fd67d0 100644
--- a/dotnetclr/tests/test_unit.py
+++ b/dotnetclr/tests/test_unit.py
@@ -2,15 +2,12 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 from datadog_checks.dotnetclr import DotnetclrCheck
 from datadog_checks.dotnetclr.metrics import METRICS_CONFIG
 
 from .common import PERFORMANCE_OBJECTS
 
-pytestmark = [requires_py3]
-
 
 def test(aggregator, dd_default_hostname, dd_run_check, mock_performance_objects):
     mock_performance_objects(PERFORMANCE_OBJECTS)
diff --git a/envoy/tests/test_unit.py b/envoy/tests/test_unit.py
index 03e68cc15f498..dfa88c05efa24 100644
--- a/envoy/tests/test_unit.py
+++ b/envoy/tests/test_unit.py
@@ -4,8 +4,7 @@
 import mock
 import pytest
 
-from datadog_checks.base import AgentCheck, ConfigurationError
-from datadog_checks.dev.testing import requires_py2, requires_py3
+from datadog_checks.base import AgentCheck
 from datadog_checks.dev.utils import get_metadata_metrics
 from datadog_checks.envoy.metrics import PROMETHEUS_METRICS_MAP
 
@@ -35,13 +34,6 @@ def test_unique_metrics():
         duplicated_metrics.add(value)
 
 
-@requires_py2
-def test_check_with_py2(aggregator, dd_run_check, check, mock_http_response):
-    with pytest.raises(ConfigurationError, match="This version of the integration is only available when using py3."):
-        check(DEFAULT_INSTANCE)
-
-
-@requires_py3
 def test_check(aggregator, dd_run_check, check, mock_http_response):
     mock_http_response(file_path=get_fixture_path('./openmetrics/openmetrics.txt'))
 
@@ -70,7 +62,6 @@ def test_check(aggregator, dd_run_check, check, mock_http_response):
     aggregator.assert_metrics_using_metadata(get_metadata_metrics())
 
 
-@requires_py3
 def test_collect_metadata(datadog_agent, fixture_path, mock_http_response, check, default_instance):
     c = check(default_instance)
     c.check_id = 'test:123'
@@ -92,7 +83,6 @@ def test_collect_metadata(datadog_agent, fixture_path, mock_http_response, check
     datadog_agent.assert_metadata_count(len(version_metadata))
 
 
-@requires_py3
 def test_collect_metadata_with_invalid_base_url(
     datadog_agent, fixture_path, mock_http_response, check, default_instance
 ):
@@ -106,7 +96,6 @@ def test_collect_metadata_with_invalid_base_url(
     c.log.debug.assert_called_with('Skipping server info collection due to malformed url: %s', b'')
 
 
-@requires_py3
 @pytest.mark.parametrize(
     'fixture_file',
     [
@@ -139,7 +128,6 @@ def test_local_rate_limit_metrics(aggregator, dd_run_check, check, mock_http_res
     aggregator.assert_metrics_using_metadata(get_metadata_metrics())
 
 
-@requires_py3
 def test_tags_in_ssl_metrics(aggregator, dd_run_check, check, mock_http_response):
     mock_http_response(file_path=get_fixture_path('./openmetrics/openmetrics_ssl_metrics.txt'))
 
@@ -157,7 +145,6 @@ def test_tags_in_ssl_metrics(aggregator, dd_run_check, check, mock_http_response
     aggregator.assert_metrics_using_metadata(get_metadata_metrics())
 
 
-@requires_py3
 def test_collect_metadata_with_disabled_collect_server_info(
     datadog_agent, fixture_path, mock_http_response, check, default_instance
 ):
diff --git a/exchange_server/tests/test_e2e.py b/exchange_server/tests/test_e2e.py
index a1f9e988c91d9..86f1713554682 100644
--- a/exchange_server/tests/test_e2e.py
+++ b/exchange_server/tests/test_e2e.py
@@ -5,7 +5,6 @@
 import pytest
 
 from datadog_checks.base import AgentCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.exchange_server.metrics import METRICS_CONFIG
 
 
@@ -24,7 +23,6 @@ def get_exchange_server_metrics():
 
 
 @pytest.mark.e2e
-@requires_py3
 def test_e2e_py3(dd_agent_check, aggregator, instance):
     aggregator = dd_agent_check(instance)
     aggregator.assert_service_check('exchange.windows.perf.health', AgentCheck.OK)
diff --git a/exchange_server/tests/test_exchange_server.py b/exchange_server/tests/test_exchange_server.py
deleted file mode 100644
index 28058889c5348..0000000000000
--- a/exchange_server/tests/test_exchange_server.py
+++ /dev/null
@@ -1,36 +0,0 @@
-# (C) Datadog, Inc. 2010-present
-# All rights reserved
-# Licensed under Simplified BSD License (see LICENSE)
-import pytest
-from datadog_test_libs.win.pdh_mocks import initialize_pdh_tests, pdh_mocks_fixture  # noqa: F401
-
-from datadog_checks.dev.testing import requires_py2
-from datadog_checks.exchange_server import ExchangeCheck
-from datadog_checks.exchange_server.metrics import DEFAULT_COUNTERS
-
-from .common import CHECK_NAME, METRIC_INSTANCES, MINIMAL_INSTANCE
-
-pytestmark = [requires_py2, pytest.mark.usefixtures('pdh_mocks_fixture')]
-
-
-@pytest.fixture(autouse=True)
-def setup_check():
-    initialize_pdh_tests()
-
-
-@pytest.mark.integration
-def test_basic_check(aggregator, dd_run_check):
-    instance = MINIMAL_INSTANCE
-    c = ExchangeCheck(CHECK_NAME, {}, [instance])
-    dd_run_check(c)
-
-    for metric_def in DEFAULT_COUNTERS:
-        metric = metric_def[3]
-        instances = METRIC_INSTANCES.get(metric)
-        if instances is not None:
-            for inst in instances:
-                aggregator.assert_metric(metric, tags=["instance:%s" % inst], count=1)
-        else:
-            aggregator.assert_metric(metric, tags=None, count=1)
-
-    assert aggregator.metrics_asserted_pct == 100.0
diff --git a/exchange_server/tests/test_unit.py b/exchange_server/tests/test_unit.py
index 472009f084ebf..cef790828bb29 100644
--- a/exchange_server/tests/test_unit.py
+++ b/exchange_server/tests/test_unit.py
@@ -2,15 +2,12 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 from datadog_checks.exchange_server import ExchangeCheck
 from datadog_checks.exchange_server.metrics import METRICS_CONFIG
 
 from .common import PERFORMANCE_OBJECTS
 
-pytestmark = [requires_py3]
-
 
 def test(aggregator, dd_default_hostname, dd_run_check, mock_performance_objects):
     mock_performance_objects(PERFORMANCE_OBJECTS)
diff --git a/gitlab/tests/test_integration.py b/gitlab/tests/test_integration.py
index 0a1ade703cb80..5aa2531a27b1e 100644
--- a/gitlab/tests/test_integration.py
+++ b/gitlab/tests/test_integration.py
@@ -5,7 +5,6 @@
 import pytest
 from requests.exceptions import ConnectionError
 
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.gitlab import GitlabCheck
 
 from .common import (
@@ -30,7 +29,6 @@ def test_check(dd_run_check, aggregator, gitlab_check, get_config, use_openmetri
     assert_check(aggregator, METRICS_TO_TEST_V2 if use_openmetrics else METRICS_TO_TEST, use_openmetrics)
 
 
-@requires_py3
 def test_check_gitaly(dd_run_check, aggregator, gitlab_check, get_config):
     from datadog_checks.gitlab.gitlab_v2 import GitlabCheckV2
 
@@ -70,7 +68,6 @@ def test_connection_failure(aggregator, gitlab_check, get_bad_config):
         )
 
 
-@requires_py3
 def test_connection_failure_openmetrics(dd_run_check, aggregator, gitlab_check, get_bad_config):
     check = gitlab_check(get_bad_config(True))
 
diff --git a/gitlab/tests/test_unit.py b/gitlab/tests/test_unit.py
index 8acbb2295edbf..b0b6bd8f12cab 100644
--- a/gitlab/tests/test_unit.py
+++ b/gitlab/tests/test_unit.py
@@ -4,8 +4,7 @@
 import pytest
 from mock.mock import MagicMock
 
-from datadog_checks.base import AgentCheck, ConfigurationError
-from datadog_checks.dev.testing import requires_py2, requires_py3
+from datadog_checks.base import AgentCheck
 from datadog_checks.dev.utils import get_metadata_metrics
 from datadog_checks.gitlab.common import get_gitlab_version
 
@@ -33,7 +32,6 @@ def test_check(dd_run_check, aggregator, mock_data, gitlab_check, get_config, us
     aggregator.assert_metrics_using_metadata(get_metadata_metrics())
 
 
-@requires_py3
 def test_check_gitaly(dd_run_check, aggregator, mock_data, gitlab_check, get_config):
     from datadog_checks.gitlab.gitlab_v2 import GitlabCheckV2
 
@@ -56,14 +54,6 @@ def test_check_gitaly(dd_run_check, aggregator, mock_data, gitlab_check, get_con
     )
 
 
-@requires_py2
-def test_openmetrics_with_python2(gitlab_check, get_config):
-    with pytest.raises(
-        ConfigurationError, match="This version of the integration is only available when using Python 3."
-    ):
-        gitlab_check(get_config(True))
-
-
 @pytest.mark.parametrize(
     "raw_version",
     [
@@ -88,7 +78,6 @@ def test_get_gitlab_version_without_token():
     assert version is None
 
 
-@requires_py3
 def test_no_gitlab_url(dd_run_check, aggregator, mock_data, gitlab_check, get_config):
     config = get_config(True)
     del config['instances'][0]['gitlab_url']
@@ -97,7 +86,6 @@ def test_no_gitlab_url(dd_run_check, aggregator, mock_data, gitlab_check, get_co
     aggregator.assert_service_check('gitlab.openmetrics.health', status=AgentCheck.OK)
 
 
-@requires_py3
 def test_parse_readiness_service_checks_with_invalid_payload(
     dd_run_check, aggregator, mock_data, gitlab_check, get_config
 ):
@@ -159,7 +147,6 @@ def test_parse_readiness_service_checks_with_invalid_payload(
         ),
     ],
 )
-@requires_py3
 def test_parse_readiness_service_checks(
     dd_run_check, aggregator, mock_data, gitlab_check, get_config, service_check, expected_redis_status
 ):
diff --git a/hyperv/tests/test_hyperv.py b/hyperv/tests/test_hyperv.py
index 112b26f560b6f..6d9abfe749977 100644
--- a/hyperv/tests/test_hyperv.py
+++ b/hyperv/tests/test_hyperv.py
@@ -4,12 +4,10 @@
 import pytest
 
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py2, requires_py3
 from datadog_checks.hyperv import HypervCheck
 from datadog_checks.hyperv.metrics import DEFAULT_COUNTERS
 
 
-@requires_py3
 def test_check(aggregator, dd_default_hostname, dd_run_check):
     check = HypervCheck('hyperv', {}, [{}])
     check.hostname = dd_default_hostname
@@ -24,14 +22,6 @@ def test_check(aggregator, dd_default_hostname, dd_run_check):
     _assert_metrics(aggregator)
 
 
-@requires_py2
-def test_check_legacy(aggregator, instance_refresh, dd_run_check):
-    check = HypervCheck('hyperv', {}, [instance_refresh])
-    dd_run_check(check)
-
-    _assert_metrics(aggregator)
-
-
 @pytest.mark.e2e
 def test_check_e2e(dd_agent_check, instance_refresh):
     aggregator = dd_agent_check(instance_refresh)
diff --git a/ibm_mq/tests/test_ibm_mq_int.py b/ibm_mq/tests/test_ibm_mq_int.py
index 72c2655eebc8e..51927607394ad 100644
--- a/ibm_mq/tests/test_ibm_mq_int.py
+++ b/ibm_mq/tests/test_ibm_mq_int.py
@@ -10,7 +10,6 @@
 
 from datadog_checks.base import AgentCheck
 from datadog_checks.base.utils.time import ensure_aware_datetime
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 
 from . import common
@@ -412,7 +411,6 @@ def test_channel_status_no_duplicates(aggregator, get_check, instance, dd_run_ch
     aggregator.assert_service_check("ibm_mq.channel.status", check.OK, tags=tags, count=1)
 
 
-@requires_py3
 def test_queue_manager_process_not_found(aggregator, get_check, instance, dd_run_check):
     class ProcessMock(object):
         @property
@@ -441,7 +439,6 @@ def info(self):
     aggregator.assert_all_metrics_covered()
 
 
-@requires_py3
 def test_queue_manager_process_found(aggregator, get_check, instance, dd_run_check):
     class ProcessMock(object):
         @property
@@ -468,7 +465,6 @@ def info(self):
     assert_all_metrics(aggregator)
 
 
-@requires_py3
 def test_queue_manager_process_found_cleanup(get_check, instance, dd_run_check):
     class ProcessMock(object):
         @property
diff --git a/ibm_mq/tests/test_ibm_mq_unit.py b/ibm_mq/tests/test_ibm_mq_unit.py
index ac9f4ef87437c..9e1d7d4cf27be 100644
--- a/ibm_mq/tests/test_ibm_mq_unit.py
+++ b/ibm_mq/tests/test_ibm_mq_unit.py
@@ -5,7 +5,6 @@
 import pytest
 
 from datadog_checks.base import AgentCheck, ConfigurationError
-from datadog_checks.dev.testing import requires_py3
 
 from .common import skip_windows_ci
 
@@ -265,7 +264,6 @@ def test_ssl_check_normal_connection_before_ssl_connection(instance_ssl_dummy):
         get_ssl_connection.assert_called_with(config, logger)
 
 
-@requires_py3
 def test_queue_manager_process_direct_ssl(instance):
     from datadog_checks.ibm_mq.config import IBMMQConfig
 
diff --git a/iis/tests/test_unit.py b/iis/tests/test_unit.py
index bced243c6e474..1f7d4b855f98c 100644
--- a/iis/tests/test_unit.py
+++ b/iis/tests/test_unit.py
@@ -2,15 +2,12 @@
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
 from datadog_checks.base.constants import ServiceCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.dev.utils import get_metadata_metrics
 from datadog_checks.iis import IIS
 from datadog_checks.iis.service_check import IIS_APPLICATION_POOL_STATE
 
 from .common import DEFAULT_COUNTERS, PERFORMANCE_OBJECTS
 
-pytestmark = [requires_py3]
-
 
 def get_metrics_data():
     app_pool_metrics_data = []
diff --git a/openstack/tests/test_openstack.py b/openstack/tests/test_openstack.py
index b44a1dea155b4..aef61e93d9069 100644
--- a/openstack/tests/test_openstack.py
+++ b/openstack/tests/test_openstack.py
@@ -9,7 +9,6 @@
 import pytest
 
 from datadog_checks.base import AgentCheck
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.openstack.openstack import (
     IncompleteAuthScope,
     IncompleteConfig,
@@ -302,7 +301,6 @@ def test_cache_between_runs(self, *args):
     assert 'server_newly_added' in cached_servers
 
 
-@requires_py3
 @pytest.mark.parametrize(
     'init_config, instances, exception',
     [
diff --git a/tls/tests/test_remote.py b/tls/tests/test_remote.py
index c2364f61fc129..bce911e5f3017 100644
--- a/tls/tests/test_remote.py
+++ b/tls/tests/test_remote.py
@@ -5,7 +5,6 @@
 import pytest
 
 from datadog_checks.base import ConfigurationError
-from datadog_checks.dev.testing import requires_py3
 from datadog_checks.tls.const import (
     SERVICE_CHECK_CAN_CONNECT,
     SERVICE_CHECK_EXPIRATION,
@@ -338,7 +337,6 @@ def test_mysql_ok(aggregator, instance_remote_mysql_valid):
     aggregator.assert_all_metrics_covered()
 
 
-@requires_py3
 def test_valid_version_with_critical_certificate_validation_and_critial_certificate_expiration(
     aggregator, instance_remote_ok
 ):
@@ -370,7 +368,6 @@ def test_valid_version_with_critical_certificate_validation_and_critial_certific
     aggregator.assert_all_metrics_covered()
 
 
-@requires_py3
 def test_valid_version_and_critical_certificate_validation_due_to_socket_exception(aggregator, instance_remote_ok):
     c = TLSCheck('tls', {}, [instance_remote_ok])
     check = TLSRemoteCheck(agent_check=c)
@@ -399,7 +396,6 @@ def test_valid_version_and_critical_certificate_validation_due_to_socket_excepti
     aggregator.assert_all_metrics_covered()
 
 
-@requires_py3
 def test_valid_version_and_critical_certificate_validation_due_to_parsing_error(aggregator, instance_remote_ok):
     c = TLSCheck('tls', {}, [instance_remote_ok])
     check = TLSRemoteCheck(agent_check=c)