fix(backend): Nog een linting-probleem opgelost

backend/tests/test-utils/expectations.ts

@@ -19,6 +19,7 @@ export function expectToBeCorrectEntity<T extends object>(
     propertyPrefix = ""
 ): void {
     for (const property in expected) {
+        if (Object.prototype.hasOwnProperty.call(expected, property)) {
             const prefixedProperty = propertyPrefix + property;
             if (
                 property in IGNORE_PROPERTIES &&
@@ -56,6 +57,7 @@ export function expectToBeCorrectEntity<T extends object>(
             }
         }
     }
+}
 
 /**
  * Checks that filtered is the correct representation of original as FilteredLearningObject.