diff --git a/src/DeprecationAnalyser.php b/src/DeprecationAnalyser.php
index 91a4ce9..621e7eb 100644
--- a/src/DeprecationAnalyser.php
+++ b/src/DeprecationAnalyser.php
@@ -421,7 +421,7 @@ class DeprecationAnalyser implements DeprecationAnalyserInterface {
     // 8.6.0, so use that version number. Otherwise use the number from the
     // message.
     $version = '';
-    if (preg_match('!\(Web)?TestBase. Deprecated in [Dd]rupal[ :]8.8.0 !', $error)) {
+    if (preg_match('!\\(Web|)TestBase. Deprecated in [Dd]rupal[ :]8.8.0 !', $error)) {
       $version = '8.6.0';
       $error .= " Replacement available from drupal:8.6.0.";
     }
diff --git a/tests/modules/upgrade_status_test_error/src/DummyTestClass.php b/tests/modules/upgrade_status_test_error/src/DummyTestClass.php
index a5640fe..b363709 100644
--- a/tests/modules/upgrade_status_test_error/src/DummyTestClass.php
+++ b/tests/modules/upgrade_status_test_error/src/DummyTestClass.php
@@ -11,4 +11,11 @@ use Drupal\simpletest\WebTestBase;
  */
 class DummyTestClass extends WebTestBase {
 
+  /**
+   * No-op test method to make testbot happy.
+   */
+  public function testNoop() {
+
+  }
+
 }