diff --git a/tests/test_fields.py b/tests/test_fields.py
index f4ef749aa..c13dc4c61 100644
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -1132,21 +1132,21 @@ class TestMappingFieldWithIntKeys(FieldValues):
     Valid and invalid values for `MappingField`.
     """
     valid_inputs = {
-        1: 'one',
-        2: 'two',
-        'three': 3,
-        'four': 4
-    }
-    invalid_inputs = {
-        5: ['"5" not found in "mapping" dict'],
-        'abc': ['"abc" not found in "mapping" dict']
-    }
-    outputs = {
         'one': 1,
         'two': 2,
         3: 'three',
         4: 'four'
     }
+    invalid_inputs = {
+        5: ['"5" not found in "mapping" values'],
+        'abc': ['"abc" not found in "mapping" values']
+    }
+    outputs = {
+        1: 'one',
+        2: 'two',
+        'three': 3,
+        'four': 4
+    }
     field = serializers.MappingField(
         mapping={
             1: 'one',