Don't call load_tasks as this would load the tasks twice

spec/support/test_env.rb

@@ -63,8 +63,8 @@ module TestEnv
   # See gitlab.yml.example test section for paths
   #
   def init(opts = {})
-    Gitlab::Application.load_tasks
-
+    Rake.application.rake_require 'tasks/gitlab/helpers'
+    Rake::Task.define_task :environment
     # Disable mailer for spinach tests
     disable_mailer if opts[:mailer] == false
 
@@ -128,6 +128,7 @@ module TestEnv
     gitlab_shell_needs_update = component_needs_update?(gitlab_shell_dir,
       Gitlab::Shell.version_required)
 
+    Rake.application.rake_require 'tasks/gitlab/shell'
     unless !gitlab_shell_needs_update || Rake.application.invoke_task('gitlab:shell:install')
       FileUtils.rm_rf(gitlab_shell_dir)
       raise "Can't install gitlab-shell"
@@ -140,6 +141,7 @@ module TestEnv
     gitaly_needs_update = component_needs_update?(gitaly_dir,
       Gitlab::GitalyClient.expected_server_version)
 
+    Rake.application.rake_require 'tasks/gitlab/gitaly'
     unless !gitaly_needs_update || Rake.application.invoke_task("gitlab:gitaly:install[#{gitaly_dir}]")
       FileUtils.rm_rf(gitaly_dir)
       raise "Can't install gitaly"

spec/tasks/gitlab/gitaly_rake_spec.rb

@@ -41,8 +41,6 @@ describe 'gitlab:gitaly namespace rake task' do
     end
 
     describe 'gmake/make' do
-      let(:command_preamble) { %w[/usr/bin/env -u BUNDLE_GEMFILE] }
-
       before(:all) do
         @old_env_ci = ENV.delete('CI')
       end
@@ -59,12 +57,12 @@ describe 'gitlab:gitaly namespace rake task' do
       context 'gmake is available' do
         before do
           expect_any_instance_of(Object).to receive(:checkout_or_clone_version)
-          allow_any_instance_of(Object).to receive(:run_command!).with(command_preamble + ['gmake']).and_return(true)
+          allow_any_instance_of(Object).to receive(:run_command!).with(['gmake']).and_return(true)
         end
 
         it 'calls gmake in the gitaly directory' do
           expect(Gitlab::Popen).to receive(:popen).with(%w[which gmake]).and_return(['/usr/bin/gmake', 0])
-          expect_any_instance_of(Object).to receive(:run_command!).with(command_preamble + ['gmake']).and_return(true)
+          expect_any_instance_of(Object).to receive(:run_command!).with(['gmake']).and_return(true)
 
           run_rake_task('gitlab:gitaly:install', clone_path)
         end
@@ -73,12 +71,12 @@ describe 'gitlab:gitaly namespace rake task' do
       context 'gmake is not available' do
         before do
           expect_any_instance_of(Object).to receive(:checkout_or_clone_version)
-          allow_any_instance_of(Object).to receive(:run_command!).with(command_preamble + ['make']).and_return(true)
+          allow_any_instance_of(Object).to receive(:run_command!).with(['make']).and_return(true)
         end
 
         it 'calls make in the gitaly directory' do
           expect(Gitlab::Popen).to receive(:popen).with(%w[which gmake]).and_return(['', 42])
-          expect_any_instance_of(Object).to receive(:run_command!).with(command_preamble + ['make']).and_return(true)
+          expect_any_instance_of(Object).to receive(:run_command!).with(['make']).and_return(true)
 
           run_rake_task('gitlab:gitaly:install', clone_path)
         end