diff --git a/testsDependency/BaconQRCodeTest.php b/testsDependency/BaconQRCodeTest.php
index 1ceeb53..321378b 100644
--- a/testsDependency/BaconQRCodeTest.php
+++ b/testsDependency/BaconQRCodeTest.php
@@ -4,6 +4,7 @@ namespace TestsDependency;
 
 use BaconQrCode\Renderer\Image\ImagickImageBackEnd;
 use PHPUnit\Framework\TestCase;
+use RobThree\Auth\Algorithm;
 use RobThree\Auth\Providers\Qr\BaconQrCodeProvider;
 use RobThree\Auth\Providers\Qr\HandlesDataUri;
 use RobThree\Auth\TwoFactorAuth;
@@ -13,7 +14,7 @@ class BaconQRCodeTest extends TestCase
 {
     use HandlesDataUri;
 
-    public function testDependency()
+    public function testDependency(): void
     {
         // php < 7.1 will install an older Bacon QR Code
         if (!class_exists(ImagickImageBackEnd::class)) {
@@ -23,35 +24,35 @@ class BaconQRCodeTest extends TestCase
         } else {
             $qr = new BaconQrCodeProvider(1, '#000', '#FFF', 'svg');
 
-            $tfa = new TwoFactorAuth('Test&Issuer', 6, 30, 'sha1', $qr);
+            $tfa = new TwoFactorAuth('Test&Issuer', 6, 30, Algorithm::Sha1, $qr);
 
             $data = $this->DecodeDataUri($tfa->getQRCodeImageAsDataUri('Test&Label', 'VMR466AB62ZBOKHE'));
             $this->assertEquals('image/svg+xml', $data['mimetype']);
         }
     }
 
-    public function testBadTextColour()
+    public function testBadTextColour(): void
     {
         $this->expectException(RuntimeException::class);
 
         new BaconQrCodeProvider(1, 'not-a-colour', '#FFF');
     }
 
-    public function testBadBackgroundColour()
+    public function testBadBackgroundColour(): void
     {
         $this->expectException(RuntimeException::class);
 
         new BaconQrCodeProvider(1, '#000', 'not-a-colour');
     }
 
-    public function testBadTextColourHexRef()
+    public function testBadTextColourHexRef(): void
     {
         $this->expectException(RuntimeException::class);
 
         new BaconQrCodeProvider(1, '#AAAA', '#FFF');
     }
 
-    public function testBadBackgroundColourHexRef()
+    public function testBadBackgroundColourHexRef(): void
     {
         $this->expectException(RuntimeException::class);
 
diff --git a/testsDependency/EndroidQRCodeTest.php b/testsDependency/EndroidQRCodeTest.php
index 0534b45..f5f4d6b 100644
--- a/testsDependency/EndroidQRCodeTest.php
+++ b/testsDependency/EndroidQRCodeTest.php
@@ -3,6 +3,7 @@
 namespace TestsDependency;
 
 use PHPUnit\Framework\TestCase;
+use RobThree\Auth\Algorithm;
 use RobThree\Auth\Providers\Qr\EndroidQrCodeProvider;
 use RobThree\Auth\Providers\Qr\HandlesDataUri;
 use RobThree\Auth\TwoFactorAuth;
@@ -11,10 +12,10 @@ class EndroidQRCodeTest extends TestCase
 {
     use HandlesDataUri;
 
-    public function testDependency()
+    public function testDependency(): void
     {
         $qr = new EndroidQrCodeProvider();
-        $tfa = new TwoFactorAuth('Test&Issuer', 6, 30, 'sha1', $qr);
+        $tfa = new TwoFactorAuth('Test&Issuer', 6, 30, Algorithm::Sha1, $qr);
         $data = $this->DecodeDataUri($tfa->getQRCodeImageAsDataUri('Test&Label', 'VMR466AB62ZBOKHE'));
         $this->assertEquals('image/png', $data['mimetype']);
         $this->assertEquals('base64', $data['encoding']);