diff --git a/pre_commit/clientlib/validate_config.py b/pre_commit/clientlib/validate_config.py
index 039f0aeb..5496cb21 100644
--- a/pre_commit/clientlib/validate_config.py
+++ b/pre_commit/clientlib/validate_config.py
@@ -3,6 +3,7 @@ from __future__ import print_function
 
 import argparse
 import re
+import sys
 
 import pre_commit.constants as C
 from pre_commit.clientlib.validate_base import get_validator
@@ -90,4 +91,4 @@ def run(argv):
 
 
 if __name__ == '__main__':
-    run()
+    sys.exit(run())
diff --git a/pre_commit/clientlib/validate_manifest.py b/pre_commit/clientlib/validate_manifest.py
index 06864b0b..168c0ddc 100644
--- a/pre_commit/clientlib/validate_manifest.py
+++ b/pre_commit/clientlib/validate_manifest.py
@@ -2,6 +2,7 @@
 from __future__ import print_function
 
 import argparse
+import sys
 
 import pre_commit.constants as C
 from pre_commit.clientlib.validate_base import get_validator
@@ -79,4 +80,4 @@ def run(argv):
 
 
 if __name__ == '__main__':
-    run()
+    sys.exit(run())
diff --git a/pre_commit/run.py b/pre_commit/run.py
index c86776cc..cd1afc0c 100644
--- a/pre_commit/run.py
+++ b/pre_commit/run.py
@@ -2,6 +2,7 @@
 import argparse
 import os.path
 import subprocess
+import sys
 
 from pre_commit import git
 from pre_commit.clientlib.validate_config import validate_config
@@ -131,4 +132,4 @@ def run(argv):
 
 
 if __name__ == '__main__':
-    run()
+    sys.exit(run())