diff --git a/tests/internal/service_name/test_extra_services_names.py b/tests/internal/service_name/test_extra_services_names.py
index 5311b854c69..483e296d52a 100644
--- a/tests/internal/service_name/test_extra_services_names.py
+++ b/tests/internal/service_name/test_extra_services_names.py
@@ -20,8 +20,16 @@ def test_config_extra_service_names_fork(run_python_code_in_subprocess):
     pid = os.fork()
     if pid == 0:
         # Child process
-        ddtrace.config._add_extra_service(f"extra_service_{i}")
-        time.sleep(0.1)  # Ensure the child has time to save the service
+        service_name = f"extra_service_{i}"
+        ddtrace.config._add_extra_service(service_name)
+        # Ensure the child has time to save the service
+        for _ in range(30):
+            time.sleep(0.1)
+            if service_name in set(ddtrace.config._extra_services_queue.peekall()):
+                break
+        else:
+            msg = f"extra service name '{service_name}' not emitted by child"
+            raise RuntimeError(msg)
         sys.exit(0)
     else:
         # Parent process