Make the warning about --include and --source be a real warning

1 files changed, 3 insertions, 5 deletions

diff --git a/tests/test_api.py b/tests/test_api.py
index d287cc2..d7e47db 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -578,11 +578,9 @@ class SourceOmitIncludeTest(OmitIncludeTestsMixin, CoverageTest):
         return summary
 
     def test_source_include_exclusive(self):
-        lines = self.coverage_usepkgs(source=["pkg1"], include=["pkg2"])
-        self.filenames_in(lines, "p1a p1b")
-        self.filenames_not_in(lines, "p2a p2b othera otherb osa osb")
-        out = self.stdout()
-        self.assertIn("--include is ignored", out)
+        cov = coverage.Coverage(source=["pkg1"], include=["pkg2"])
+        with self.assert_warnings(cov, ["--include is ignored because --source is set"]):
+            cov.start()
 
     def test_source_package_as_dir(self):
         # pkg1 is a directory, since we cd'd into tests/modules in setUp.