diff --git a/.github/workflows/Lint-and-test.yml b/.github/workflows/Lint-and-test.yml
index 5495ede0..694ca70a 100644
--- a/.github/workflows/Lint-and-test.yml
+++ b/.github/workflows/Lint-and-test.yml
@@ -7,10 +7,12 @@ jobs:
       compare-branch: origin/main
       python-ver: '3.11'
   tests:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        version: ['3.10','3.11'] # ,'3.12'] # also check on 3.12 once https://github.com/bluesky/ophyd-async/pull/478 is merged.
+        os: [ "ubuntu-latest", "windows-latest" ]
+        version: ['3.10', '3.11', '3.12']
+      fail-fast: false
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
@@ -18,8 +20,12 @@ jobs:
           python-version: ${{ matrix.version }}
       - name: install requirements
         run: pip install -e .[dev]
-      - name: run pytest
+      - name: run pytest (linux)
         run: IBEX_BLUESKY_CORE_LOGS=/tmp/ibex_bluesky_core_logs/ python -m pytest
+        if: startsWith(matrix.os,'ubuntu')
+      - name: run pytest (windows)
+        run: python -m pytest
+        if: startsWith(matrix.os,'windows')
   results:
     if: ${{ always() }}
     runs-on: ubuntu-latest
diff --git a/tests/callbacks/test_write_log_callback.py b/tests/callbacks/test_write_log_callback.py
index 1280fc7e..ad108612 100644
--- a/tests/callbacks/test_write_log_callback.py
+++ b/tests/callbacks/test_write_log_callback.py
@@ -70,7 +70,7 @@ def test_event_prints_header_with_units_and_respects_precision_of_value_on_first
     mock_file.assert_called_with(cb.filename, "a", newline="")
     first_call = call(f"\n{field_name}({units})\n")
     second_call = call(f"{expected_value:.{prec}f}\n")
-    assert mock_file().write.has_calls(first_call, second_call)
+    mock_file().write.assert_has_calls([first_call, second_call])
     assert mock_file().write.call_count == 2
 
 
@@ -93,9 +93,7 @@ def test_event_prints_header_without_units_and_does_not_truncate_precision_if_no
         cb.event(event)
 
     mock_file.assert_called_with(cb.filename, "a", newline="")
-    first_call = call(f"\n{field_name}({units})\n")
-    second_call = call(f"{expected_value}\n")
-    assert mock_file().write.has_calls(first_call, second_call)
+    mock_file().write.assert_has_calls([call("\ntest\n"), call("1.2345\n")])
     assert mock_file().write.call_count == 2