diff --git a/tools/coveragerc b/tools/coveragerc
index 2b1c55e964..617a673fb7 100644
--- a/tools/coveragerc
+++ b/tools/coveragerc
@@ -10,7 +10,7 @@ exclude_lines =
     # Don't require coverage for test suite AssertionError -- they're usually for clarity
     raise AssertionError
     # Don't require coverage for __str__ statements just used for printing
-    def __str__[(]self[)]:
+    def __str__[(]self[)] -> .*:
 
 [run]
 omit =