diff --git a/testing/insert.test b/testing/insert.test
index 8887f0c32..85492cd62 100755
--- a/testing/insert.test
+++ b/testing/insert.test
@@ -235,7 +235,7 @@ do_execsql_test_on_specific_db {:memory:} not_null_insert_multiple_values {
     CREATE TABLE t2 (y INT PRIMARY KEY NOT NULL);
     INSERT INTO t2 (y) VALUES (1), (NULL);
     SELECT * FROM t2;
-} {"Runtime error: NOTNULL constraint failed: t2.y (19)"
+} {"Runtime error: NOT NULL constraint failed: t2.y (19)"
 }
 
 do_execsql_test_in_memory_any_error not_null_insert_any_error {