diff --git a/graphene_django/utils/testing.py b/graphene_django/utils/testing.py
index b1aa29b..7c9b152 100644
--- a/graphene_django/utils/testing.py
+++ b/graphene_django/utils/testing.py
@@ -45,7 +45,7 @@ def graphql_query(
     if variables:
         body["variables"] = variables
     if input_data:
-        if variables in body:
+        if "variables" in body:
             body["variables"]["input"] = input_data
         else:
             body["variables"] = {"input": input_data}