diff --git a/mypy/test/test_find_sources.py b/mypy/test/test_find_sources.py
index 6d66a28f4e2d..ba5b613a0948 100644
--- a/mypy/test/test_find_sources.py
+++ b/mypy/test/test_find_sources.py
@@ -372,4 +372,4 @@ def test_find_sources_exclude(self) -> None:
             "pkg/a2/b/f.py",
         }
         fscache = FakeFSCache(files)
-        assert len(find_sources(["/"], options, fscache)) == len(files)
+        assert len(find_sources(["."], options, fscache)) == len(files)