no need to modify it if it already equals that

Author: SalmonMode

pytest_django/fixtures.py

@@ -180,12 +180,11 @@ def _set_suffix_to_test_databases(suffix):
 
         if test_name == ":memory:":
             continue
+        if test_name.endswith("_{}".format(suffix)):
+            continue
 
         db_settings.setdefault("TEST", {})
-        test_db_name = test_name
-        if not test_name.endswith("_{}".format(suffix)):
-            test_db_name = "{}_{}".format(test_name, suffix)
-        db_settings["TEST"]["NAME"] = test_db_name
+        db_settings["TEST"]["NAME"] = "{}_{}".format(test_name, suffix)
 
 
 # ############### User visible fixtures ################