diff --git a/recipe_modules/roll_util/test_api.py b/recipe_modules/roll_util/test_api.py
new file mode 100644
index 0000000..efb98a2
--- /dev/null
+++ b/recipe_modules/roll_util/test_api.py
@@ -0,0 +1,37 @@
+# Copyright 2020 The Pigweed Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+from recipe_engine import post_process, recipe_test_api
+
+
+class RollUtilTestApi(recipe_test_api.RecipeTestApi):
+
+  def commit(self, hash, message):
+    return ' '.join((hash, message))
+
+  def commit_data(self, *commits):
+    return self.step_data('roll message.git log',
+                          stdout=self.m.raw_io.output('\0'.join(commits)))
+
+  def cancelled(self):
+    return self.post_process(post_process.MustRunRE, '.*cancelling roll.*')
+
+  def not_cancelled(self):
+    return self.post_process(post_process.DoesNotRunRE, '.*cancelling roll.*')
+
+  def rolls_forward(self, prefix='', name='check roll direction'):
+    return self.step_data(prefix + name, retcode=0)
+
+  def rolls_backward(self, prefix='', name='check roll direction'):
+    return self.step_data(prefix + name, retcode=1)