diff --git a/tests/IDNAEncoder.php b/tests/IDNAEncoder.php
index b22ae4023..f1f5ce511 100644
--- a/tests/IDNAEncoder.php
+++ b/tests/IDNAEncoder.php
@@ -5,11 +5,11 @@ public static function specExamples() {
 		return array(
 			array(
 				"\xe4\xbb\x96\xe4\xbb\xac\xe4\xb8\xba\xe4\xbb\x80\xe4\xb9\x88\xe4\xb8\x8d\xe8\xaf\xb4\xe4\xb8\xad\xe6\x96\x87",
-				"xn--ihqwcrb4cv8a8dqg056pqjye",
+				'xn--ihqwcrb4cv8a8dqg056pqjye',
 			),
 			array(
 				"\x33\xe5\xb9\xb4\x42\xe7\xb5\x84\xe9\x87\x91\xe5\x85\xab\xe5\x85\x88\xe7\x94\x9f",
-				"xn--3B-ww4c5e180e575a65lsy2b",
+				'xn--3B-ww4c5e180e575a65lsy2b',
 			),
 		);
 	}
@@ -26,7 +26,7 @@ public function testEncoding($data, $expected) {
 	 * @expectedException Requests_Exception
 	 */
 	public function testASCIITooLong() {
-		$data   = str_repeat("abcd", 20);
+		$data   = str_repeat('abcd', 20);
 		$result = Requests_IDNAEncoder::encode($data);
 	}
 
@@ -46,7 +46,7 @@ public function testAlreadyPrefixed() {
 	}
 
 	public function testASCIICharacter() {
-		$result = Requests_IDNAEncoder::encode("a");
+		$result = Requests_IDNAEncoder::encode('a');
 		$this->assertEquals('a', $result);
 	}
 
diff --git a/tests/Requests.php b/tests/Requests.php
index 57c95c1d5..dda3e6488 100644
--- a/tests/Requests.php
+++ b/tests/Requests.php
@@ -70,7 +70,7 @@ public function testRawAccess() {
 		$transport->data =
 			"HTTP/1.0 200 OK\r\n" .
 			"Host: localhost\r\n\r\n" .
-			"Test";
+			'Test';
 
 		$options  = array(
 			'transport' => $transport,