Kunal Sachdev
--- a/tests/src/FunctionalJavascript/ProjectBrowserInstallerUiTest.php
+++ b/tests/src/FunctionalJavascript/ProjectBrowserInstallerUiTest.php
    $this->assertTrue($is_visible);
  }

+  /**
+   * Tests that the messages set by projects while installing are shown.
+   */
+  public function testMessagesSetByProjectsAreShown(): void {
+    TestActivator::handle('drupal/cream_cheese');
+    $this->drupalGet('project-browser/project_browser_test_mock');
+    $messages_to_set = ["This message is from Cream cheese on a bagel", "For testing purpose only."];
+    TestActivator::setMessagesOnActivate('drupal/cream_cheese', $messages_to_set);
+    $card = $this->waitForProject('Cream cheese on a bagel');
+    $card->pressButton('Install Cream cheese on a bagel');
+    $this->waitForProjectToBeInstalled($card);
+    foreach ($messages_to_set as $message) {
+      $this->assertPageHasText($message);