diff --git a/core/lib/Drupal/Core/Url.php b/core/lib/Drupal/Core/Url.php
index 4747ed2..604d3d6 100644
--- a/core/lib/Drupal/Core/Url.php
+++ b/core/lib/Drupal/Core/Url.php
@@ -297,8 +297,13 @@ public function setOption($name, $value) {
    *
    * @return string
    *   The external path.
+   *
+   * @throws \Exception
    */
   public function getPath() {
+    if (!$this->isExternal()) {
+      throw new \Exception('Internal URLs do not have external paths.');
+    }
     return $this->path;
   }
 
diff --git a/core/tests/Drupal/Tests/Core/ExternalUrlTest.php b/core/tests/Drupal/Tests/Core/ExternalUrlTest.php
index 6e7a163..f355b97 100644
--- a/core/tests/Drupal/Tests/Core/ExternalUrlTest.php
+++ b/core/tests/Drupal/Tests/Core/ExternalUrlTest.php
@@ -184,6 +184,17 @@ public function testGetInternalPath(Url $url) {
   }
 
   /**
+   * Tests the getPath() method.
+   *
+   * @depends testCreateFromPath
+   *
+   * @covers ::getPath()
+   */
+  public function testGetPath(Url $url) {
+    $this->assertNotNull($url->getPath());
+  }
+
+  /**
    * Tests the getOptions() method.
    *
    * @depends testCreateFromPath
diff --git a/core/tests/Drupal/Tests/Core/UrlTest.php b/core/tests/Drupal/Tests/Core/UrlTest.php
index dd786dc..50ea4d3 100644
--- a/core/tests/Drupal/Tests/Core/UrlTest.php
+++ b/core/tests/Drupal/Tests/Core/UrlTest.php
@@ -202,6 +202,21 @@ public function testIsExternal($urls) {
   }
 
   /**
+   * Tests the getPath() method for internal URLs.
+   *
+   * @depends testCreateFromPath
+   *
+   * @expectedException \Exception
+   *
+   * @covers ::getPath()
+   */
+  public function testGetPathForInternalUrl($urls) {
+    foreach ($urls as $url) {
+      $url->getPath();
+    }
+  }
+
+  /**
    * Tests the toString() method.
    *
    * @param \Drupal\Core\Url[] $urls