diff --git a/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.test.ts b/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.test.ts
index 67edcc356e902..4374bbe88e183 100644
--- a/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.test.ts
+++ b/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.test.ts
@@ -92,6 +92,7 @@ describe('source engine routes', () => {
     it('creates a request to enterprise search', () => {
       expect(mockRequestHandler.createRequest).toHaveBeenCalledWith({
         path: '/as/engines/:name/source_engines/bulk_create',
+        hasJsonResponse: false,
       });
     });
   });
@@ -145,6 +146,7 @@ describe('source engine routes', () => {
     it('creates a request to enterprise search', () => {
       expect(mockRequestHandler.createRequest).toHaveBeenCalledWith({
         path: '/as/engines/:name/source_engines/:source_engine_name',
+        hasJsonResponse: false,
       });
     });
   });
diff --git a/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.ts b/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.ts
index 1d41a82287b0e..79be0c9c29322 100644
--- a/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.ts
+++ b/x-pack/plugins/enterprise_search/server/routes/app_search/source_engines.ts
@@ -45,6 +45,7 @@ export function registerSourceEnginesRoutes({
     },
     enterpriseSearchRequestHandler.createRequest({
       path: '/as/engines/:name/source_engines/bulk_create',
+      hasJsonResponse: false,
     })
   );
 
@@ -60,6 +61,7 @@ export function registerSourceEnginesRoutes({
     },
     enterpriseSearchRequestHandler.createRequest({
       path: '/as/engines/:name/source_engines/:source_engine_name',
+      hasJsonResponse: false,
     })
   );
 }