diff --git a/test/runner/lib/executor.py b/test/runner/lib/executor.py
index ed8a4326bbe..75d95ec9f6f 100644
--- a/test/runner/lib/executor.py
+++ b/test/runner/lib/executor.py
@@ -1136,7 +1136,7 @@ class SanityConfig(TestConfig):
             self.base_branch = args.base_branch  # str
         elif is_shippable():
             try:
-                self.base_branch = os.environ['BASE_BRANCH']  # str
+                self.base_branch = 'origin/%s' % os.environ['BASE_BRANCH']  # str
             except KeyError as ex:
                 raise MissingEnvironmentVariable(name=ex.args[0])
         else: