diff --git a/lib/tfw/components/snapshot_provider.py b/lib/tfw/components/snapshot_provider.py
index 1a11c51..96ea772 100644
--- a/lib/tfw/components/snapshot_provider.py
+++ b/lib/tfw/components/snapshot_provider.py
@@ -84,6 +84,7 @@ class SnapshotProvider:
         return stdout_bytes.decode().rstrip('\n')
 
     def _run(self, *args, **kwargs):
+        kwargs['check'] = True
         if 'env' not in kwargs:
             kwargs['env'] = self.gitenv
         return run(*args, **kwargs)