diff --git a/ultralytics/utils/benchmarks.py b/ultralytics/utils/benchmarks.py
index 507f904f5..29d599a49 100644
--- a/ultralytics/utils/benchmarks.py
+++ b/ultralytics/utils/benchmarks.py
@@ -96,7 +96,7 @@ def benchmark(
         assert isinstance(format, str), f"Expected a string type but got {type(format)}"
         assert (
             format in formats["Argument"].values
-        ), f"Expected format to be one of {formats["Argument"].values}, but got '{format}'"
+        ), f"Expected format to be one of {formats['Argument'].values}, but got '{format}'"
         formats = formats[formats["Argument"] == format]
     y = []
     t0 = time.time()