diff --git a/tests/i18n/test_extraction.py b/tests/i18n/test_extraction.py
index 5287677bab..a611eb97a1 100644
--- a/tests/i18n/test_extraction.py
+++ b/tests/i18n/test_extraction.py
@@ -508,17 +508,19 @@ class BasicExtractorTests(ExtractorTests):
         cmd.ignore_patterns = ["CVS", ".*", "*~", "*.pyc"]
         cmd.symlinks = False
         cmd.domain = "django"
-        cmd.extensions = ["html", "txt", "py"]
+        cmd.extensions = [".html", ".txt", ".py"]
         cmd.verbosity = 0
         cmd.locale_paths = []
         cmd.default_locale_path = os.path.join(self.test_dir, "locale")
         found_files = cmd.find_files(self.test_dir)
+        self.assertGreater(len(found_files), 1)
         found_exts = {os.path.splitext(tfile.file)[1] for tfile in found_files}
         self.assertEqual(found_exts.difference({".py", ".html", ".txt"}), set())
 
-        cmd.extensions = ["js"]
+        cmd.extensions = [".js"]
         cmd.domain = "djangojs"
         found_files = cmd.find_files(self.test_dir)
+        self.assertGreater(len(found_files), 1)
         found_exts = {os.path.splitext(tfile.file)[1] for tfile in found_files}
         self.assertEqual(found_exts.difference({".js"}), set())