diff --git a/benchmarks/data/test_tools.py b/benchmarks/data/test_tools.py
index b2e8d028c41f5ca3b64b989cb18708314e391cf3..60cb2fd875f887c94be6d7bbac9a6426642ec070 100644
--- a/benchmarks/data/test_tools.py
+++ b/benchmarks/data/test_tools.py
@@ -339,7 +339,7 @@ class TestUnitsTools(unittest.TestCase):
 
 
 def set_units_mul(data, units):
-    return data * units
+    return units * data
 
 
 def set_units_qua(data, units):