diff --git a/tests/test_validation.py b/tests/test_validation.py
index a79d61b1..99b9eb56 100644
--- a/tests/test_validation.py
+++ b/tests/test_validation.py
@@ -18,7 +18,7 @@
     make_app, setup_session_dir, teardown_session_dir)
 
 from tg._compat import PY3, unicode_text, u_, default_im_func
-from tg.validation import TGValidationError, _ValidationStatus, Convert
+from tg.validation import TGValidationError, _ValidationStatus, Convert, RequireValue
 from tg.i18n import lazy_ugettext as l_
 
 
@@ -318,6 +318,13 @@ def chain_validation_2(self, val):
     def chain_validation_begin(self, val):
         return '>3'
 
+    @expose(content_type='text/plain')
+    @validate({
+        'val': RequireValue(msg=l_("Value is required"))
+    }, error_handler=validation_errors_response)
+    def require_value(self, val=None):
+        return val
+
 
 class TestTGController(TestWSGIController):
     def setup_method(self):
@@ -505,6 +512,13 @@ def test_validation_errors_lazy_unicode(self):
         resp = self.app.post('/lazy_unicode_error_pow', {'num': 'NOT_A_NUMBER'}, status=412)
         assert resp.json['errors']['num'] == u_('àèìòù'), resp.json
 
+    def test_requirevalue_validation(self):
+        resp = self.app.post('/require_value', {"val": "hello"})
+        assert resp.text == 'hello', resp
+
+        resp = self.app.post('/require_value', {}, status=412)
+        assert resp.json["errors"]["val"] == 'Value is required', resp
+
 
 class TestChainValidation(TestWSGIController):
     def setup_method(self):
diff --git a/tg/validation.py b/tg/validation.py
index 169da4aa..d22eafd6 100644
--- a/tg/validation.py
+++ b/tg/validation.py
@@ -1,5 +1,6 @@
 import warnings
 
+from tg.configuration.utils import TGConfigError
 from tg._compat import unicode_text
 
 from .i18n import lazy_ugettext
@@ -89,7 +90,7 @@ def check(self, config, method, params):
                     validation_function = validation_validators[supported_class]
 
             if validation_function is None:
-                raise TGConfigError(f"No validation validator function found for: {exception_class}")
+                raise TGConfigError(f"No validation validator function found for: {schema_class}")
 
             validated_params = validation_function(validators, params)