diff --git a/pre_commit/languages/docker.py b/pre_commit/languages/docker.py
index eea1bdcd..72a98ea5 100644
--- a/pre_commit/languages/docker.py
+++ b/pre_commit/languages/docker.py
@@ -82,14 +82,14 @@ def get_docker_user() -> Tuple[str, ...]:  # pragma: win32 no cover
         ('docker', 'system', 'info'),
         text=True,
     )
+    for line in output.splitlines():
+        # rootless docker has "rootless"
+        # rootless podman has "rootless: true"
+        if line.strip().startswith('rootless'):
+            if 'false' not in line:
+                return ()  # no -u for rootless
+            break
     try:
-        for line in output.splitlines():
-            # rootless docker has "rootless"
-            # rootless podman has "rootless: true"
-            if line.strip().startswith('rootless'):
-                if 'false' not in line:
-                    return ()  # no -u for rootless
-                break
         return ('-u', f'{os.getuid()}:{os.getgid()}')
     except AttributeError:
         return ()