diff --git a/tests/DirectGatewayTest.php b/tests/DirectGatewayTest.php
index 7355783e..46858557 100644
--- a/tests/DirectGatewayTest.php
+++ b/tests/DirectGatewayTest.php
@@ -73,7 +73,7 @@ public function testAuthorizeFailure()
         $this->assertFalse($response->isSuccessful());
         $this->assertFalse($response->isRedirect());
 
-        // With no suuccess and no redirect, there will be no transaction reference.
+        // With no success and no redirect, there will be no transaction reference.
         //$this->assertSame('{"VendorTxCode":"123"}', $response->getTransactionReference());
         $this->assertNull($response->getTransactionReference());
 
diff --git a/tests/Message/DirectAuthorizeRequestTest.php b/tests/Message/DirectAuthorizeRequestTest.php
index a7462fb3..e18bf2ba 100644
--- a/tests/Message/DirectAuthorizeRequestTest.php
+++ b/tests/Message/DirectAuthorizeRequestTest.php
@@ -6,7 +6,7 @@
 
 class DirectAuthorizeRequestTest extends TestCase
 {
-    // VISA incurrs a surcharge of 2.5% when used.
+    // VISA incurs a surcharge of 2.5% when used.
     const SURCHARGE_XML = '<surcharges><surcharge>'
         . '<paymentType>VISA</paymentType><percentage>2.50</percentage>'
         . '</surcharge></surcharges>';
@@ -287,13 +287,13 @@ public function testMixedBasketWithSpecialChars()
     {
         $items = new \Omnipay\Common\ItemBag(array(
             new \Omnipay\Common\Item(array(
-                'name' => "Denisé's Odd & Wierd £name? #12345678901234567890123456789012345678901234567890123456789012345678901234567890",
+                'name' => "Denisé's Odd & Weird £name? #12345678901234567890123456789012345678901234567890123456789012345678901234567890",
                 'description' => 'Description',
                 'quantity' => 2,
                 'price' => 4.23,
             )),
             array(
-                'name' => "Denisé's \"Odd\" & Wierd £discount? #",
+                'name' => "Denisé's \"Odd\" & Weird £discount? #",
                 'description' => 'My Offer',
                 'quantity' => 2,
                 'price' => -0.10,
@@ -309,11 +309,11 @@ public function testMixedBasketWithSpecialChars()
 
         // Names/descriptions should be max 100 characters in length, once invalid characters have been removed.
         $expected = '<basket><item>'
-            . '<description>Denis\'s Odd &amp; Wierd name 123456789012345678901234567890123456789012345678901234567890123456789012345</description><quantity>2</quantity>'
+            . '<description>Denis\'s Odd &amp; Weird name 123456789012345678901234567890123456789012345678901234567890123456789012345</description><quantity>2</quantity>'
             . '<unitNetAmount>4.23</unitNetAmount><unitTaxAmount>0.00</unitTaxAmount>'
             . '<unitGrossAmount>4.23</unitGrossAmount><totalGrossAmount>8.46</totalGrossAmount>'
             . '</item><discounts>'
-            . '<discount><fixed>0.2</fixed><description>Denis\'s "Odd"  Wierd discount? #</description></discount>'
+            . '<discount><fixed>0.2</fixed><description>Denis\'s "Odd"  Weird discount? #</description></discount>'
             . '<discount><fixed>1.6</fixed><description>1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890</description></discount>'
             . '</discounts></basket>';
 
diff --git a/tests/Message/DirectPurchaseRequestTest.php b/tests/Message/DirectPurchaseRequestTest.php
index d14918be..1fb04176 100644
--- a/tests/Message/DirectPurchaseRequestTest.php
+++ b/tests/Message/DirectPurchaseRequestTest.php
@@ -6,7 +6,7 @@
 
 class DirectPurchaseRequestTest extends DirectAuthorizeRequestTest
 {
-    // VISA incurrs a surcharge of 2.5% when used.
+    // VISA incurs a surcharge of 2.5% when used.
     const SURCHARGE_XML = '<surcharges><surcharge>'
         . '<paymentType>VISA</paymentType><percentage>2.50</percentage>'
         . '</surcharge></surcharges>';
diff --git a/tests/Message/ServerNotifyRequestTest.php b/tests/Message/ServerNotifyRequestTest.php
index 5875df2c..34dc9114 100644
--- a/tests/Message/ServerNotifyRequestTest.php
+++ b/tests/Message/ServerNotifyRequestTest.php
@@ -62,8 +62,8 @@ public function testServerNotifyResponseSuccess()
 
         $this->request->setSecurityKey('JEUPDN1N7E');
 
-        // With the security key added, the signatue check will now be valid,
-        // i.e. an untampered inbound notification.
+        // With the security key added, the signature check will now be valid,
+        // i.e. an un-tampered inbound notification.
 
         $this->assertTrue($this->request->isValid());
 
@@ -123,7 +123,7 @@ public function testServerNotifyRequestFailure()
             $this->getHttpRequest()
         );
 
-        // The transactino reference in Response and ServerNotifyTrait
+        // The transaction reference in Response and ServerNotifyTrait
         // will return null if there is no transaction data provided
         // by the gateway.
 
@@ -227,7 +227,7 @@ public function testInvalid()
     }
 
     /**
-     * sendRequest lets you return a raw message with no additinal
+     * sendRequest lets you return a raw message with no additional
      * checks on the validity of what was received.
      */
     public function testSendResponse()
diff --git a/tests/Message/SharedCaptureRequestTest.php b/tests/Message/SharedCaptureRequestTest.php
index 0035709b..ba73081b 100644
--- a/tests/Message/SharedCaptureRequestTest.php
+++ b/tests/Message/SharedCaptureRequestTest.php
@@ -25,13 +25,13 @@ public function testTxType()
 
         $this->assertSame('RELEASE', $this->request->getTxType());
 
-        // User authenticate explicity true.
+        // User authenticate explicitly true.
 
         $this->request->setUseAuthenticate(true);
 
         $this->assertSame('AUTHORISE', $this->request->getTxType());
 
-        // User authenticate explicity false (back to the default).
+        // User authenticate explicitly false (back to the default).
 
         $this->request->setUseAuthenticate(false);