Exclude nbdime tests on python 3.9

Author: ianthomas23

.github/workflows/main.yml

@@ -35,7 +35,12 @@ jobs:
     - name: Install package with test dependencies
       run: pip install .[test]
 
-    - name: Test installation
+    - name: Test installation with nbdime
+      if: ${{ matrix.python-version != "3.9" }}
+      run: pytest -v --nbdime
+
+    - name: Test installation without nbdime
+      if: ${{ matrix.python-version == "3.9" }}
       run: pytest -v
 
     - name: Test flake8

pyproject.toml

@@ -63,7 +63,6 @@ xfail_strict = true
 log_cli_level = "info"
 addopts = [
     "--nbval",
-    "--nbdime",
     "--ignore=tests/notebooks/.ipynb_checkpoints/*",
 ]
 testpaths = [