diff --git a/tests/FrontControllerTest.php b/tests/FrontControllerTest.php
index 40e8d2e..4962c7f 100644
--- a/tests/FrontControllerTest.php
+++ b/tests/FrontControllerTest.php
@@ -260,17 +260,6 @@ class FrontControllerTest extends TestCase
         $this->assertRequestIsOk('video', ['url' => 'https://www.youtube.com/watch?v=M7IpKCZ47pU']);
     }
 
-    /**
-     * Test the video() function with a video that does not have a title.
-     *
-     * @return void
-     */
-    public function testVideoWithoutTitle()
-    {
-        $this->markTestSkipped('This URL triggers a curl SSL error on Travis');
-        $this->assertRequestIsOk('video', ['url' => 'http://html5demos.com/video']);
-    }
-
     /**
      * Test the video() function with audio conversion.
      *
diff --git a/tests/LocaleManagerTest.php b/tests/LocaleManagerTest.php
index 2808362..0e88239 100644
--- a/tests/LocaleManagerTest.php
+++ b/tests/LocaleManagerTest.php
@@ -86,4 +86,15 @@ class LocaleManagerTest extends TestCase
         $this->localeManager->unsetLocale();
         $this->assertNull($this->localeManager->getLocale());
     }
+
+    /**
+     * Test that the environment is correctly set up.
+     *
+     * @return void
+     */
+    public function testEnv()
+    {
+        $this->localeManager->setLocale(new Locale('foo_BAR'));
+        $this->assertEquals('foo_BAR', getenv('LANG'));
+    }
 }
diff --git a/tests/LocaleMiddlewareTest.php b/tests/LocaleMiddlewareTest.php
index 35c30e2..0db9f9f 100644
--- a/tests/LocaleMiddlewareTest.php
+++ b/tests/LocaleMiddlewareTest.php
@@ -50,15 +50,15 @@ class LocaleMiddlewareTest extends TestCase
      * Test the testLocale() function.
      *
      * @return void
+     * @requires OS Linux
      */
     public function testTestLocale()
     {
-        $this->markTestSkipped('For some reason, this test fails on Travis even if the fr_FR locale is installed.');
         $locale = [
-            'language' => 'fr',
-            'region'   => 'FR',
+            'language' => 'en',
+            'region'   => 'US',
         ];
-        $this->assertEquals('fr_FR', $this->middleware->testLocale($locale));
+        $this->assertEquals('en_US', $this->middleware->testLocale($locale));
     }
 
     /**
@@ -131,14 +131,4 @@ class LocaleMiddlewareTest extends TestCase
             [$this, 'assertNoHeader']
         );
     }
-
-    /**
-     * Test that the environment is correctly set up.
-     *
-     * @return void
-     */
-    public function testEnv()
-    {
-        $this->markTestIncomplete('We need to find a way to reliably test LC_ALL and LANG values');
-    }
 }