diff --git a/test_constraints/CMakeLists.txt b/test_constraints/CMakeLists.txt
index 6787d988..c2784d14 100644
--- a/test_constraints/CMakeLists.txt
+++ b/test_constraints/CMakeLists.txt
@@ -33,11 +33,9 @@ function(test_constraint name pattern)
   set_property(TEST ${test} PROPERTY PASS_REGULAR_EXPRESSION ${pattern})
 endfunction()
 
-add_executable(see_what_happens no_conversion_operator_if_null_not_trivial.cpp)
-target_link_libraries(see_what_happens PRIVATE sqlpp11 sqlpp11_testing)
 test_constraint(count_of_count "count\\(\\) cannot be used on an aggregate function")
 test_constraint(max_of_max "max\\(\\) cannot be used on an aggregate function")
-test_constraint(no_conversion_operator_if_null_not_trivial "int i = row.alpha")
+test_constraint(no_conversion_operator_if_null_not_trivial "cannot convert|no viable conversion")
 test_constraint(require_insert "required column is missing")
 test_constraint(must_not_insert "one assignment is prohibited")
 test_constraint(must_not_update "one assignment is prohibited")