diff --git a/lib/retest/runner.rb b/lib/retest/runner.rb
index 8d6e52d..8cae55c 100644
--- a/lib/retest/runner.rb
+++ b/lib/retest/runner.rb
@@ -86,9 +86,11 @@ def sync(added:, removed:)
 
     def system_run(command)
       log("\n")
-      result = system(command) ? :tests_pass : :tests_fail
+      pid = spawn(command)
+      Process.wait
+      result = $?.exitstatus.zero?
       changed
-      notify_observers(result)
+      notify_observers(result ? :tests_pass : :test_fail)
     end
 
     def log(message)