diff --git a/VERSION b/VERSION
index 3a17781..29a1ade 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.0-rc3
+1.0.0-rc4
diff --git a/kim/pipelines/numeric.py b/kim/pipelines/numeric.py
index e711ca2..e612eed 100644
--- a/kim/pipelines/numeric.py
+++ b/kim/pipelines/numeric.py
@@ -21,11 +21,12 @@ def is_valid_integer(session):
     """
 
     try:
-        return int(session.data)
+        session.data = int(session.data)
     except TypeError:
         raise session.field.invalid(error_type='type_error')
     except ValueError:
         raise session.field.invalid(error_type='type_error')
+    return session.data
 
 
 @pipe()
diff --git a/setup.py b/setup.py
index d410a6f..93b1430 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ class PyTest(TestCommand):
 
     def finalize_options(self):
         TestCommand.finalize_options(self)
-        self.test_args = ['-x', '-s']
+        self.test_args = ['-s']
         self.test_suite = True
 
     def run_tests(self):
diff --git a/tests/test_pipelines/test_numeric.py b/tests/test_pipelines/test_numeric.py
index fdb4a4c..42a60c3 100644
--- a/tests/test_pipelines/test_numeric.py
+++ b/tests/test_pipelines/test_numeric.py
@@ -46,6 +46,12 @@ def test_integer_input():
     field.marshal(mapper_session)
     assert output == {'name': 2}
 
+    output = {}
+    mapper_session = get_mapper_session(
+        data={'name': '2', 'email': 'mike@mike.com'}, output=output)
+    field.marshal(mapper_session)
+    assert output == {'name': 2}
+
 
 def test_integer_field_invalid_type():
 
@@ -122,6 +128,10 @@ def test_min_max():
     field.marshal(mapper_session)
     assert output == {'age': 25}
 
+    mapper_session = get_mapper_session(data={'age': '25'}, output=output)
+    field.marshal(mapper_session)
+    assert output == {'age': 25}
+
 
 def test_is_valid_decimal_pipe():
     """test piping data through is_valid_decimal.