These tests needed temp directories

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/test_api.py b/tests/test_api.py
index cbb0cf82..af759a07 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -667,7 +667,9 @@ class NamespaceModuleTest(UsingModulesMixin, CoverageTest):
 class IncludeOmitTestsMixin(UsingModulesMixin, CoverageTestMethodsMixin):
     """Test methods for coverage methods taking include and omit."""
 
-    run_in_temp_dir = False
+    # We don't write any source files, but the data file will collide with
+    # other tests if we don't have a temp dir.
+    no_files_in_temp_dir = True
 
     def filenames_in(self, summary, filenames):
         """Assert the `filenames` are in the keys of `summary`."""