diff --git a/awscliv2/api.py b/awscliv2/api.py
index 49005c9..9d69dd7 100644
--- a/awscliv2/api.py
+++ b/awscliv2/api.py
@@ -90,7 +90,9 @@ def execute(self, args: Sequence[str]) -> str:
         return_code = self.run_awscli_v2(args)
         if return_code:
             self.output.seek(0)
-            raise AWSCLIError(f"Command {shlex.join(args)} failed with code {return_code}: {self.output.read()}")
+            raise AWSCLIError(
+                f"Command {shlex.join(args)} failed with code {return_code}: {self.output.read()}"
+            )
         self.output.seek(0)
         result = self.output.read()
         self.output = old_output