diff --git a/tests/src/python/test_provider_ogr_gpkg.py b/tests/src/python/test_provider_ogr_gpkg.py
index a82bb0cc3bc..3e4abde6459 100644
--- a/tests/src/python/test_provider_ogr_gpkg.py
+++ b/tests/src/python/test_provider_ogr_gpkg.py
@@ -1296,8 +1296,8 @@ class TestPyQgsOGRProviderGpkg(unittest.TestCase):
     def test_quote_identifier(self):
         """Regression #21100"""
 
-        tmpfile = os.path.join(self.basetestpath, 'bug21100-wierd_field_names.gpkg')  # spellok
-        shutil.copy(os.path.join(unitTestDataPath(''), 'bug21100-wierd_field_names.gpkg'), tmpfile) # spellok
+        tmpfile = os.path.join(self.basetestpath, 'bug_21100-wierd_field_names.gpkg')  # spellok
+        shutil.copy(os.path.join(unitTestDataPath(''), 'bug_21100-wierd_field_names.gpkg'), tmpfile) # spellok
         vl = QgsVectorLayer('{}|layerid=0'.format(tmpfile), 'foo', 'ogr')
         self.assertTrue(vl.isValid())
         for i in range(1, len(vl.fields())):
diff --git a/tests/testdata/bug21100-wierd_field_names.gpkg b/tests/testdata/bug_21100-wierd_field_names.gpkg
similarity index 100%
rename from tests/testdata/bug21100-wierd_field_names.gpkg
rename to tests/testdata/bug_21100-wierd_field_names.gpkg