1 files changed, 10 insertions, 0 deletions
diff --git a/tests/expressions/tests.py b/tests/expressions/tests.py
index f7233305a7..3538900092 100644
--- a/tests/expressions/tests.py
+++ b/tests/expressions/tests.py
@@ -1425,6 +1425,16 @@ class SimpleExpressionTests(SimpleTestCase):
             hash(Expression(TestModel._meta.get_field("other_field"))),
         )
 
+    def test_get_expression_for_validation_only_one_source_expression(self):
+        expression = Expression()
+        expression.constraint_validation_compatible = False
+        msg = (
+            "Expressions with constraint_validation_compatible set to False must have "
+            "only one source expression."
+        )
+        with self.assertRaisesMessage(ValueError, msg):
+            expression.get_expression_for_validation()
+
 
 class ExpressionsNumericTests(TestCase):
     @classmethod