diff --git a/test/integration/processes_lifecycle_test.rb b/test/integration/processes_lifecycle_test.rb
index 8ecd8238..55e9ca30 100644
--- a/test/integration/processes_lifecycle_test.rb
+++ b/test/integration/processes_lifecycle_test.rb
@@ -42,7 +42,7 @@ class ProcessLifecycleTest < ActiveSupport::TestCase
     puts @pid
     puts `ps aux | grep #{@pid}`
 
-    assert_not process_exists?(@pid)
+    assert_not process_exists?(@pid, waitpid: true)
 
     assert_completed_job_results("no pause")
     assert_job_status(no_pause, :finished)
@@ -70,7 +70,7 @@ class ProcessLifecycleTest < ActiveSupport::TestCase
     signal_process(@pid, :QUIT, wait: 1.second)
     wait_for_jobs_to_finish_for(5.seconds)
 
-    assert_not process_exists?(@pid)
+    assert_not process_exists?(@pid, waitpid: true)
 
     assert_completed_job_results("no pause")
     assert_job_status(no_pause, :finished)
diff --git a/test/test_helper.rb b/test/test_helper.rb
index e73b878b..e9da9825 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -88,7 +88,8 @@ def signal_process(pid, signal, wait: nil, raise_on_missing: true)
       end
     end
 
-    def process_exists?(pid)
+    def process_exists?(pid, waitpid: false)
+      Process.waitpid(pid) if waitpid
       Process.getpgid(pid)
       true
     rescue Errno::ESRCH