diff --git a/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php b/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php
index ca45baefe7..1cf2688a80 100644
--- a/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php
+++ b/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php
@@ -159,6 +159,9 @@ protected function setUp() {
     // Select profile.
     $this->setUpProfile();
 
+    // Address the requirements problem screen, if any.
+    $this->setUpRequirementsProblem();
+
     // Configure settings.
     $this->setUpSettings();
 
@@ -198,7 +201,7 @@ protected function setUp() {
   }
 
   /**
-   *{@inheritdoc}
+   * {@inheritdoc}
    */
   protected function initFrontPage() {
     // We don't want to visit the front page with the installer when
@@ -240,6 +243,23 @@ protected function setUpSettings() {
     $this->drupalPostForm(NULL, $edit, $this->translations['Save and continue']);
   }
 
+  /**
+   * Installer step: Requirements problem.
+   *
+   * Override this method to test specific requirements warnings or errors
+   * during the installer.
+   *
+   * @see system_requirements()
+   */
+  protected function setUpRequirementsProblem() {
+    // By default, skip the "recommended PHP version" warning on older test
+    // environments. This allows the installer to be tested consistently on
+    // both recommended PHP versions and older (but still supported) versions.
+    if (version_compare(phpversion(), DRUPAL_RECOMMENDED_PHP) < 0) {
+      $this->continueOnExpectedWarnings(['PHP']);
+    }
+  }
+
   /**
    * Final installer step: Configure site.
    */
@@ -285,4 +305,45 @@ protected function refreshVariables() {
     }
   }
 
+  /**
+   * Continues installation when an expected warning is found.
+   *
+   * @param string[] $expected_warnings
+   *   A list of warning summaries to expect on the requirements screen (e.g.
+   *   'PHP', 'PHP OPcode caching', etc.). If only the expected warnings
+   *   are found, the test will click the "continue anyway" link to go to the
+   *   next screen of the installer. If an expected warning is not found, or if
+   *   a warning not in the list is present, a fail is raised.
+   */
+  protected function continueOnExpectedWarnings($expected_warnings = []) {
+    // Don't try to continue if there are errors.
+    if (strpos($this->getTextContent(), 'Errors found') !== FALSE) {
+      return;
+    }
+    // Allow only details elements that are directly after the warning header
+    // or each other. There is no guaranteed wrapper we can rely on across
+    // distributions. When there are multiple warnings, the selectors will be:
+    // - h3#warning+details summary
+    // - h3#warning+details+details summary
+    // - etc.
+    // We add one more selector than expected warnings to confirm that there
+    // isn't any other warning before clicking the link.
+    // @todo Make this more reliable in
+    //   https://www.drupal.org/project/drupal/issues/2927345.
+    $selectors = [];
+    for ($i = 0; $i <= count($expected_warnings); $i++) {
+      $selectors[] = 'h3#warning' . implode('', array_fill(0, $i + 1, '+details')) . ' summary';
+    }
+    $warning_elements = $this->cssSelect(implode(', ', $selectors));
+
+    // Confirm that there are only the expected warnings.
+    $warnings = [];
+    foreach ($warning_elements as $warning) {
+      $warnings[] = trim($warning->getText());
+    }
+    $this->assertEquals($expected_warnings, $warnings);
+    $this->clickLink('continue anyway');
+    $this->checkForMetaRefresh();
+  }
+
 }