diff --git a/mlir/test/python/dialects/python_test.py b/mlir/test/python/dialects/python_test.py
--- a/mlir/test/python/dialects/python_test.py
+++ b/mlir/test/python/dialects/python_test.py
@@ -129,6 +129,7 @@
     del op.unit
     print(f"Unit: {op.unit}")
 
+
 # CHECK-LABEL: TEST: inferReturnTypes
 @run
 def inferReturnTypes():
@@ -207,6 +208,7 @@
       # CHECK: index
       print(implied.index.type)
 
+
 # CHECK-LABEL: TEST: testOptionalOperandOp
 @run
 def testOptionalOperandOp():