Fix spec/features/merge_requests/squash_spec.rb spec failures

spec/features/merge_requests/squash_spec.rb

@@ -48,7 +48,7 @@ feature 'Squashing merge requests', js: true, feature: true do
 
   context 'when squash is enabled on merge request creation' do
     before do
-      visit new_namespace_project_merge_request_path(project.namespace, project, merge_request: { source_branch: source_branch })
+      visit new_namespace_project_merge_request_path(project.namespace, project, merge_request: { target_branch: 'master', source_branch: source_branch })
       check 'merge_request[squash]'
       click_on 'Submit merge request'
       wait_for_ajax
@@ -78,7 +78,7 @@ feature 'Squashing merge requests', js: true, feature: true do
 
   context 'when squash is not enabled on merge request creation' do
     before do
-      visit new_namespace_project_merge_request_path(project.namespace, project, merge_request: { source_branch: source_branch })
+      visit new_namespace_project_merge_request_path(project.namespace, project, merge_request: { target_branch: 'master', source_branch: source_branch })
       click_on 'Submit merge request'
       wait_for_ajax
     end