diff --git a/.github/workflows/test-bacon.yml b/.github/workflows/test-bacon.yml
new file mode 100644
index 0000000..98c45dd
--- /dev/null
+++ b/.github/workflows/test-bacon.yml
@@ -0,0 +1,30 @@
+name: Test Bacon QR Code Provider
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-version }}
+        tools: composer
+        coverage: xdebug
+        ini-values: error_reporting=E_ALL
+
+    - uses: ramsey/composer-install@v1
+
+    - run: composer require bacon/bacon-qr-code
+
+    - run: composer lint
+    - run: composer test testsDependency/BaconQRCodeTest.php
diff --git a/lib/Providers/Qr/BaconQrCodeProvider.php b/lib/Providers/Qr/BaconQrCodeProvider.php
index 4d5cf01..65fb977 100644
--- a/lib/Providers/Qr/BaconQrCodeProvider.php
+++ b/lib/Providers/Qr/BaconQrCodeProvider.php
@@ -125,12 +125,19 @@ class BaconQrCodeProvider implements IQRCodeProvider
     {
         if (is_string($colour) && $colour[0] == '#') {
             $hexToRGB = function ($input) {
+                // ensure input no longer has a # for more predictable division
+                // PHP 8.1 does not like implicitly casting a float to an int
+                $input = trim($input, '#');
+
+                if (strlen($input) != 3 && strlen($input) != 6) {
+                    throw new \RuntimeException('Colour should be a 3 or 6 character value after the #');
+                }
+
                 // split the array into three chunks
-                $split = str_split(trim($input, '#'), strlen($input) / 3);
+                $split = str_split($input, strlen($input) / 3);
 
                 // cope with three character hex reference
-                // three characters plus a # = 4
-                if (strlen($input) == 4) {
+                if (strlen($input) == 3) {
                     array_walk($split, function (&$character) {
                         $character = str_repeat($character, 2);
                     });
diff --git a/lib/Providers/Qr/HandlesDataUri.php b/lib/Providers/Qr/HandlesDataUri.php
new file mode 100644
index 0000000..c9f8571
--- /dev/null
+++ b/lib/Providers/Qr/HandlesDataUri.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace RobThree\Auth\Providers\Qr;
+
+trait HandlesDataUri
+{
+	/**
+     * @param string $datauri
+     *
+     * @return null|array
+     */
+    private function DecodeDataUri($datauri)
+    {
+        if (preg_match('/data:(?P<mimetype>[\w\.\-\+\/]+);(?P<encoding>\w+),(?P<data>.*)/', $datauri, $m) === 1) {
+            return array(
+                'mimetype' => $m['mimetype'],
+                'encoding' => $m['encoding'],
+                'data' => base64_decode($m['data'])
+            );
+        }
+
+        return null;
+    }
+}
diff --git a/tests/Providers/Qr/IQRCodeProviderTest.php b/tests/Providers/Qr/IQRCodeProviderTest.php
index 579cb51..bf52d6e 100644
--- a/tests/Providers/Qr/IQRCodeProviderTest.php
+++ b/tests/Providers/Qr/IQRCodeProviderTest.php
@@ -5,26 +5,11 @@ namespace Tests\Providers\Qr;
 use PHPUnit\Framework\TestCase;
 use RobThree\Auth\TwoFactorAuth;
 use RobThree\Auth\TwoFactorAuthException;
+use RobThree\Auth\Providers\Qr\HandlesDataUri;
 
 class IQRCodeProviderTest extends TestCase
 {
-    /**
-     * @param string $datauri
-     *
-     * @return null|array
-     */
-    private function DecodeDataUri($datauri)
-    {
-        if (preg_match('/data:(?P<mimetype>[\w\.\-\/]+);(?P<encoding>\w+),(?P<data>.*)/', $datauri, $m) === 1) {
-            return array(
-                'mimetype' => $m['mimetype'],
-                'encoding' => $m['encoding'],
-                'data' => base64_decode($m['data'])
-            );
-        }
-
-        return null;
-    }
+    use HandlesDataUri;
 
     /**
      * @return void
diff --git a/testsDependency/BaconQRCodeTest.php b/testsDependency/BaconQRCodeTest.php
new file mode 100644
index 0000000..e46f13d
--- /dev/null
+++ b/testsDependency/BaconQRCodeTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace TestsDependency;
+
+use BaconQrCode\Renderer\Image\ImagickImageBackEnd;
+use PHPUnit\Framework\TestCase;
+use RobThree\Auth\Providers\Qr\BaconQrCodeProvider;
+use RobThree\Auth\TwoFactorAuth;
+use RobThree\Auth\Providers\Qr\HandlesDataUri;
+
+class BaconQRCodeTest extends TestCase
+{
+    use HandlesDataUri;
+
+    public function testDependency()
+    {
+        // php < 7.1 will install an older Bacon QR Code
+        if (! class_exists(ImagickImageBackEnd::class)) {
+            $this->expectException(\RuntimeException::class);
+
+            $qr = new BaconQrCodeProvider(1, '#000', '#FFF', 'svg');
+        } else {
+            $qr = new BaconQrCodeProvider(1, '#000', '#FFF', 'svg');
+
+            $tfa = new TwoFactorAuth('Test&Issuer', 6, 30, 'sha1', $qr);
+
+            $data = $this->DecodeDataUri($tfa->getQRCodeImageAsDataUri('Test&Label', 'VMR466AB62ZBOKHE'));
+            $this->assertEquals('image/svg+xml', $data['mimetype']);
+        }
+    }
+
+    public function testBadTextColour()
+    {
+        $this->expectException(\RuntimeException::class);
+
+        new BaconQrCodeProvider(1, 'not-a-colour', '#FFF');
+    }
+
+    public function testBadBackgroundColour()
+    {
+        $this->expectException(\RuntimeException::class);
+
+        new BaconQrCodeProvider(1, '#000', 'not-a-colour');
+    }
+
+    public function testBadTextColourHexRef()
+    {
+        $this->expectException(\RuntimeException::class);
+
+        new BaconQrCodeProvider(1, '#AAAA', '#FFF');
+    }
+
+    public function testBadBackgroundColourHexRef()
+    {
+        $this->expectException(\RuntimeException::class);
+
+        new BaconQrCodeProvider(1, '#000', '#AAAA');
+    }
+
+
+}