diff --git a/codecov/__init__.py b/codecov/__init__.py
index 39d9a980..4db4c4b7 100644
--- a/codecov/__init__.py
+++ b/codecov/__init__.py
@@ -297,7 +297,7 @@ def main(*argv, **kwargs):
         # Travis CI
         # ---------
         elif os.getenv('CI') == 'true' and os.getenv('TRAVIS') == "true" and os.getenv('SHIPPABLE') != 'true':
-            # http://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables
+            # https://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables
             query.update(dict(branch=os.getenv('TRAVIS_BRANCH'),
                               service='travis',
                               build=os.getenv('TRAVIS_JOB_NUMBER'),
@@ -316,6 +316,27 @@ def main(*argv, **kwargs):
             if language:
                 _add_env_if_not_empty(include_env, 'TRAVIS_%s_VERSION' % language.upper())
 
+        # ---------------
+        # Azure Pipelines
+        # ---------------
+        elif os.getenv("TF_BUILD") == "True" and os.getenv("SHIPPABLE") != "true":
+            # https://docs.microsoft.com/en-us/azure/devops/pipelines/build/variables?view=azure-devops&tabs=yaml
+            # https://docs.microsoft.com/en-us/azure/devops/pipelines/migrate/from-travis?view=azure-devops#predefined-variables
+            query.update(dict(branch=os.getenv("BUILD_SOURCEBRANCH",
+                                               os.getenv("SYSTEM_PULLREQUEST_TARGETBRANCH")),
+                              service="azure_pipelines",
+                              build=os.getenv("AGENT_JOBNAME"),
+                              pr=os.getenv("SYSTEM_PULLREQUEST_PULLREQUESTID",
+                                           os.getenv("SYSTEM_PULLREQUEST_PULLREQUESTNUMBER")),
+                              tag=os.getenv("BUILD_SOURCEBRANCH"),
+                              slug=os.getenv("BUILD_REPOSITORYNAME"),
+                              commit=os.getenv("BUILD_SOURCEVERSION"),
+                              ),
+                         )
+            root = os.getenv("BUILD_SOURCESDIRECTORY") or root
+            write("    Azure Pipelines Detected")
+            _add_env_if_not_empty(include_env, "AGENT_OS")
+
         # --------
         # Codeship
         # --------
diff --git a/tests/test.py b/tests/test.py
index 5d3f23e2..23346fea 100644
--- a/tests/test.py
+++ b/tests/test.py
@@ -45,7 +45,13 @@ def setUp(self):
                     "APPVEYOR_BUILD_VERSION", "APPVEYOR_JOB_ID", "APPVEYOR_REPO_NAME", "APPVEYOR_REPO_COMMIT", "WERCKER_GIT_BRANCH",
                     "WERCKER_MAIN_PIPELINE_STARTED", "WERCKER_GIT_OWNER", "WERCKER_GIT_REPOSITORY",
                     "CI_BUILD_REF_NAME", "CI_BUILD_ID", "CI_BUILD_REPO", "CI_PROJECT_DIR", "CI_BUILD_REF", "CI_SERVER_NAME",
-                    "ghprbActualCommit", "ghprbSourceBranch", "ghprbPullId", "WERCKER_GIT_COMMIT", "CHANGE_ID"):
+                    "ghprbActualCommit", "ghprbSourceBranch", "ghprbPullId", "WERCKER_GIT_COMMIT", "CHANGE_ID",
+                    "AGENT_JOBNAME", "AGENT_OS", "BUILD_REPOSITORYNAME",
+                    "BUILD_SOURCEBRANCH", "BUILD_SOURCESDIRECTORY",
+                    "BUILD_SOURCEVERSION", "SYSTEM_PULLREQUEST_PULLREQUESTID",
+                    "SYSTEM_PULLREQUEST_PULLREQUESTNUMBER",
+                    "SYSTEM_PULLREQUEST_TARGETBRANCH", "TF_BUILD",
+                    ):
             os.environ[key] = ""
 
     def tearDown(self):
@@ -392,6 +398,32 @@ def test_ci_travis(self):
         self.assertEqual(res['query']['branch'], 'master')
         self.assertEqual(res['codecov'].token, '')
 
+    @unittest.skipUnless(os.getenv("TF_BUILD") == "true"
+                         and os.getenv("SHIPPABLE") != "true",
+                         "Skip Azure Pipelines test")
+    def test_ci_azurepipelines(self):
+        self.set_env(TF_BUILD="True",
+                     AGENT_JOBNAME="job name",
+                     AGENT_OS="Linux",
+                     BUILD_REPOSITORYNAME="owner/repo",
+                     BUILD_SOURCEBRANCH="feature-branch",
+                     BUILD_SOURCESDIRECTORY="some/path",
+                     BUILD_SOURCEVERSION="c739768fcac68144a3a6d82305b9c4106934d31a",
+                     SYSTEM_PULLREQUEST_PULLREQUESTID="123",
+                     SYSTEM_PULLREQUEST_PULLREQUESTNUMBER="123456",
+                     SYSTEM_PULLREQUEST_TARGETBRANCH="master",
+                     )
+        self.fake_report()
+        res = self.run_cli()
+        self.assertEqual(res['query']['service'], 'azure_pipelines')
+        self.assertEqual(res['query']['commit'], 'c739768fcac68144a3a6d82305b9c4106934d31a')
+        self.assertEqual(res['query']['build'], 'job name')
+        self.assertEqual(res['query']['pr'], '123')
+        self.assertEqual(res['query']['tag'], 'feature-branch')
+        self.assertEqual(res['query']['slug'], 'owner/repo')
+        self.assertEqual(res['query']['branch'], 'feature-branch')
+        self.assertEqual(res['codecov'].token, '')
+
     @unittest.skipUnless(os.getenv('CI') == 'true' and os.getenv('CI_NAME') == 'codeship', 'Skip Codeship CI test')
     def test_ci_codeship(self):
         self.set_env(CI_NAME='codeship',