diff --git a/cirq-google/cirq_google/engine/engine_client.py b/cirq-google/cirq_google/engine/engine_client.py
index a3c93b72a1e..97796a83281 100644
--- a/cirq-google/cirq_google/engine/engine_client.py
+++ b/cirq-google/cirq_google/engine/engine_client.py
@@ -220,9 +220,7 @@ async def create_program_async(
         if labels:
             program.labels.update(labels)
 
-        request = quantum.CreateQuantumProgramRequest(
-            parent=parent_name, quantum_program=program, overwrite_existing_source_code=False
-        )
+        request = quantum.CreateQuantumProgramRequest(parent=parent_name, quantum_program=program)
         program = await self._send_request_async(self.grpc_client.create_quantum_program, request)
         return _ids_from_program_name(program.name)[1], program
 
@@ -277,7 +275,7 @@ async def list_programs_async(
             val = _date_or_time_to_filter_expr('created_before', created_before)
             filters.append(f"create_time <= {val}")
         if has_labels is not None:
-            for (k, v) in has_labels.items():
+            for k, v in has_labels.items():
                 filters.append(f"labels.{k}:{v}")
         request = quantum.ListQuantumProgramsRequest(
             parent=_project_name(project_id), filter=" AND ".join(filters)
@@ -471,9 +469,7 @@ async def create_job_async(
         if labels:
             job.labels.update(labels)
         request = quantum.CreateQuantumJobRequest(
-            parent=_program_name_from_ids(project_id, program_id),
-            quantum_job=job,
-            overwrite_existing_run_context=False,
+            parent=_program_name_from_ids(project_id, program_id), quantum_job=job
         )
         job = await self._send_request_async(self.grpc_client.create_quantum_job, request)
         return _ids_from_job_name(job.name)[2], job
@@ -528,7 +524,7 @@ async def list_jobs_async(
             val = _date_or_time_to_filter_expr('created_before', created_before)
             filters.append(f"create_time <= {val}")
         if has_labels is not None:
-            for (k, v) in has_labels.items():
+            for k, v in has_labels.items():
                 filters.append(f"labels.{k}:{v}")
         if execution_states is not None:
             state_filter = []
diff --git a/cirq-google/cirq_google/engine/engine_client_test.py b/cirq-google/cirq_google/engine/engine_client_test.py
index e45127eb21c..149d67741bb 100644
--- a/cirq-google/cirq_google/engine/engine_client_test.py
+++ b/cirq-google/cirq_google/engine/engine_client_test.py
@@ -56,7 +56,6 @@ def test_create_program(client_constructor):
                 description='A program',
                 labels=labels,
             ),
-            overwrite_existing_source_code=False,
         )
     )
 
@@ -67,7 +66,6 @@ def test_create_program(client_constructor):
             quantum_program=quantum.QuantumProgram(
                 name='projects/proj/programs/prog', code=code, description='A program'
             ),
-            overwrite_existing_source_code=False,
         )
     )
 
@@ -78,7 +76,6 @@ def test_create_program(client_constructor):
             quantum_program=quantum.QuantumProgram(
                 name='projects/proj/programs/prog', code=code, labels=labels
             ),
-            overwrite_existing_source_code=False,
         )
     )
 
@@ -87,16 +84,13 @@ def test_create_program(client_constructor):
         quantum.CreateQuantumProgramRequest(
             parent='projects/proj',
             quantum_program=quantum.QuantumProgram(name='projects/proj/programs/prog', code=code),
-            overwrite_existing_source_code=False,
         )
     )
 
     assert client.create_program('proj', program_id=None, code=code) == ('prog', result)
     grpc_client.create_quantum_program.assert_called_with(
         quantum.CreateQuantumProgramRequest(
-            parent='projects/proj',
-            quantum_program=quantum.QuantumProgram(code=code),
-            overwrite_existing_source_code=False,
+            parent='projects/proj', quantum_program=quantum.QuantumProgram(code=code)
         )
     )
 
@@ -387,7 +381,6 @@ def test_create_job(client_constructor):
                 description='A job',
                 labels=labels,
             ),
-            overwrite_existing_run_context=False,
         )
     )
 
@@ -409,7 +402,6 @@ def test_create_job(client_constructor):
                 ),
                 description='A job',
             ),
-            overwrite_existing_run_context=False,
         )
     )
 
@@ -430,7 +422,6 @@ def test_create_job(client_constructor):
                 ),
                 labels=labels,
             ),
-            overwrite_existing_run_context=False,
         )
     )
 
@@ -451,7 +442,6 @@ def test_create_job(client_constructor):
                     ),
                 ),
             ),
-            overwrite_existing_run_context=False,
         )
     )
 
@@ -475,7 +465,6 @@ def test_create_job(client_constructor):
                     ),
                 ),
             ),
-            overwrite_existing_run_context=False,
         )
     )