diff --git a/pre_commit/commands/validate_config.py b/pre_commit/commands/validate_config.py
index 911348bd..c99b84a6 100644
--- a/pre_commit/commands/validate_config.py
+++ b/pre_commit/commands/validate_config.py
@@ -9,7 +9,7 @@ def validate_config(filenames: Sequence[str]) -> int:
     ret = 0
 
     if not filenames:
-        raise FileNotFoundError("No files found. Did you supply a config to validate? (E.g. pre-commit validate-config path/to/.pre-commit-config.yaml)")
+        raise FileNotFoundError('No files found. Did you supply a config to validate? (E.g. pre-commit validate-config path/to/.pre-commit-config.yaml)')
 
     for filename in filenames:
         try:
@@ -18,6 +18,6 @@ def validate_config(filenames: Sequence[str]) -> int:
             print(e)
             ret = 1
     if ret == 0:
-        formatted_filenames = "\n".join([filename for filename in filenames])
-        print(f"The following configs were validated:\n{formatted_filenames}")
+        formatted_filenames = '\n'.join([filename for filename in filenames])
+        print(f'The following configs were validated:\n{formatted_filenames}')
     return ret