diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index b5482b5..c0adb06 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -10,14 +10,14 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         php-versions: ["7.3", "7.4"]
-        phpunit-version: ["7", "8", "9"]
+        phpunit-version: ["6", "7", "8", "9"]
     name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.os }} (PHPUnit ${{ matrix.phpunit-version }})
     steps:
       - name: Checkout
         uses: actions/checkout@v2
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@v1
+        uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php-versions }}
           extensions: mbstring
diff --git a/composer.json b/composer.json
index 1f4c881..ba9e60d 100644
--- a/composer.json
+++ b/composer.json
@@ -10,6 +10,7 @@
         }
     ],
     "autoload": {
+        "files": ["src/Functions/helpers.php"],
         "psr-4": {
             "mheap\\GithubActionsReporter\\": "src"
         }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 2b2002c..c31b621 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -14,6 +14,9 @@
         <testsuite name="Github Actions printer for PHPUnit Test Suite">
             <directory suffix=".phpt">./test/</directory>
         </testsuite>
+        <testsuite name="Github Actions printer for PHPUnit Test Suite">
+            <directory suffix=".php">./test/Unit/</directory>
+        </testsuite>
     </testsuites>
     <filter>
         <whitelist>
diff --git a/src/Functions/helpers.php b/src/Functions/helpers.php
new file mode 100644
index 0000000..4167bc5
--- /dev/null
+++ b/src/Functions/helpers.php
@@ -0,0 +1,123 @@
+<?php
+
+namespace mheap\GithubActionsReporter\Functions;
+
+use mheap\GithubActionsReporter\Printer6;
+use mheap\GithubActionsReporter\Printer7;
+use mheap\GithubActionsReporter\Printer8;
+use mheap\GithubActionsReporter\Printer9;
+use PHPUnit\Framework\TestFailure;
+use ReflectionClass;
+
+/**
+ * @param $version
+ *
+ * @return string|null Fully Qualified Class Name, or null if no matching version
+ *
+ * @internal
+ */
+function determinePrinter($version)
+{
+    $versionMatrix = [
+        // greater than equals, lower than equals, printer FQCN
+        ['6.0', '6.99.99', Printer6::class],
+        ['7.0', '7.99.99', Printer7::class],
+        ['8.0', '8.99.99', Printer8::class],
+        ['9.0', true, Printer9::class],
+    ];
+
+    foreach ($versionMatrix as list($lowerVersion, $upperVersion, $class)) {
+        if (
+            version_compare($version, $lowerVersion, '>=') == true &&
+            ($upperVersion === true || version_compare($version, $upperVersion, '<=') == true)
+        ) {
+            return $class;
+        }
+    }
+
+    return null;
+}
+
+/**
+ * @param TestFailure $defect
+ * @param string $defectType
+ *
+ * @return string
+ * @throws \ReflectionException
+ * @internal
+ */
+function printDefectTrace($defect, $defectType)
+{
+    $e = $defect->thrownException();
+
+    $errorLines = array_filter(
+        explode("\n", (string)$e),
+        static function ($l) {
+            return $l;
+        }
+    );
+
+    $error = end($errorLines);
+    $lineIndex = strrpos($error, ":");
+    $path = substr($error, 0, $lineIndex);
+    $line = substr($error, $lineIndex + 1);
+
+    list($reflectedPath, $reflectedLine) = getReflectionFromTest(
+        $defect->getTestName()
+    );
+
+    if ($path !== $reflectedPath) {
+        $path = $reflectedPath;
+        $line = $reflectedLine;
+    }
+
+    $message = explode("\n", $defect->getExceptionAsString());
+    $message = implode('%0A', $message);
+
+    // Some messages might contain paths. Let's convert thost to relative paths too
+    $message = relativePath($message);
+    $message = preg_replace('/%0A$/', '', $message);
+
+    $path = relativePath($path);
+    $file = "file={$path}";
+    $line = "line={$line}";
+
+    return "::{$defectType} $file,$line::{$message}\n";
+}
+
+/**
+ * @param string $path
+ *
+ * @return mixed
+ * @internal
+ */
+function relativePath($path)
+{
+    $relative = str_replace(getcwd() . DIRECTORY_SEPARATOR, '', $path);
+
+    // Translate \ in to / for Windows
+    return str_replace('\\', '/', $relative);
+}
+
+/**
+ * @param string $name
+ *
+ * @return array
+ * @throws \ReflectionException
+ * @internal
+ */
+function getReflectionFromTest($name)
+{
+    list($klass, $method) = explode('::', $name);
+
+    // Handle data providers
+    $parts = explode(" ", $method, 2);
+    if (count($parts) > 1) {
+        $method = $parts[0];
+    }
+
+    $c = new ReflectionClass($klass);
+    $m = $c->getMethod($method);
+
+    return [$m->getFileName(), $m->getStartLine()];
+}
diff --git a/src/Printer.php b/src/Printer.php
index 28774a5..14a3057 100644
--- a/src/Printer.php
+++ b/src/Printer.php
@@ -5,31 +5,15 @@
 namespace mheap\GithubActionsReporter;
 
 use PHPUnit\Runner\Version;
-use PHPUnit_TextUI_ResultPrinter;
 
-$low  = version_compare(Version::series(), '7.0', '>=');
-$high = version_compare(Version::series(), '7.99.99', '<=');
+use function mheap\GithubActionsReporter\Functions\determinePrinter;
 
-if ($low && $high) {
-    class Printer extends Printer7
-    {
-    }
-}
-
-$low  = version_compare(Version::series(), '8.0', '>=');
-$high = version_compare(Version::series(), '8.99.99', '<=');
+$class = determinePrinter(Version::series());
 
-if ($low && $high) {
-    class Printer extends Printer8
-    {
-    }
+if ($class === null) {
+    throw new \RuntimeException('Unable to find supporting PHPUnit print for your version');
 }
 
-$low  = version_compare(Version::series(), '9.0', '>=');
-$high = true; // version_compare(Version::series(),'8.99.99','<=');
-
-if ($low && $high) {
-    class Printer extends Printer9
-    {
-    }
+if (class_alias($class, '\mheap\GithubActionsReporter\Printer') === false) {
+    throw new \RuntimeException('Unable to setup autoloading alias for printer');
 }
diff --git a/src/Printer6.php b/src/Printer6.php
new file mode 100644
index 0000000..e442f2d
--- /dev/null
+++ b/src/Printer6.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace mheap\GithubActionsReporter;
+
+use PHPUnit\TextUI\ResultPrinter;
+use PHPUnit\Framework\TestFailure;
+use PHPUnit\Framework\TestResult;
+
+use function mheap\GithubActionsReporter\Functions\printDefectTrace;
+
+class Printer6 extends ResultPrinter
+{
+    /**
+     * @var null|string
+     */
+    private $currentType;
+
+    protected function printHeader(): void
+    {
+    }
+
+    protected function writeProgress($progress): void
+    {
+    }
+
+    protected function printFooter(TestResult $result): void
+    {
+    }
+
+    protected function printDefects(array $defects, $type): void
+    {
+        $this->currentType = (in_array($type, ['error', 'failure']) === true) ? 'error' : 'warning';
+
+        foreach ($defects as $i => $defect) {
+            $this->printDefect($defect, $i);
+        }
+    }
+
+    protected function printDefectHeader(TestFailure $defect, $count): void
+    {
+    }
+
+    /**
+     * @throws \ReflectionException
+     */
+    protected function printDefectTrace(TestFailure $defect): void
+    {
+        $this->write(printDefectTrace($defect, $this->currentType));
+    }
+}
diff --git a/src/Printer7.php b/src/Printer7.php
index 6ad7a21..ee9f9c5 100644
--- a/src/Printer7.php
+++ b/src/Printer7.php
@@ -6,9 +6,14 @@
 use PHPUnit\Framework\TestFailure;
 use PHPUnit\Framework\TestResult;
 
+use function mheap\GithubActionsReporter\Functions\printDefectTrace;
+
 class Printer7 extends ResultPrinter
 {
-    protected $currentType = null;
+    /**
+     * @var null|string
+     */
+    private $currentType;
 
     protected function printHeader(): void
     {
@@ -24,7 +29,7 @@ protected function printFooter(TestResult $result): void
 
     protected function printDefects(array $defects, string $type): void
     {
-        $this->currentType = $type;
+        $this->currentType = (in_array($type, ['error', 'failure']) === true) ? 'error' : 'warning';
 
         foreach ($defects as $i => $defect) {
             $this->printDefect($defect, $i);
@@ -37,73 +42,6 @@ protected function printDefectHeader(TestFailure $defect, int $count): void
 
     protected function printDefectTrace(TestFailure $defect): void
     {
-        $e = $defect->thrownException();
-
-        $errorLines = array_filter(
-            explode("\n", (string)$e),
-            function ($l) {
-                return $l;
-            }
-        );
-
-        $error = end($errorLines);
-        $lineIndex = strrpos($error, ":");
-        $path = substr($error, 0, $lineIndex);
-        $line = substr($error, $lineIndex + 1);
-
-        list($reflectedPath, $reflectedLine) = $this->getReflectionFromTest(
-            $defect->getTestName()
-        );
-
-        if ($path !== $reflectedPath) {
-            $path = $reflectedPath;
-            $line = $reflectedLine;
-        }
-
-        $message = explode("\n", $defect->getExceptionAsString());
-        $message = implode('%0A', $message);
-
-        // Some messages might contain paths. Let's convert thost to relative paths too
-        $message = $this->relativePath($message);
-
-        $message = preg_replace('/%0A$/', '', $message);
-
-        $type = $this->getCurrentType();
-        $file = "file={$this->relativePath($path)}";
-        $line = "line={$line}";
-        $this->write("::{$type} $file,$line::{$message}\n");
-    }
-
-    protected function getCurrentType()
-    {
-        if (in_array($this->currentType, ['error', 'failure'])) {
-            return 'error';
-        }
-
-        return 'warning';
-    }
-
-    protected function relativePath(string $path)
-    {
-        $relative = str_replace(getcwd() . DIRECTORY_SEPARATOR, '', $path);
-        // Translate \ in to / for Windows
-        $relative = str_replace('\\', '/', $relative);
-        return $relative;
-    }
-
-    protected function getReflectionFromTest(string $name)
-    {
-        list($klass, $method) = explode('::', $name);
-
-        // Handle data providers
-        $parts = explode(" ", $method, 2);
-        if (count($parts) > 1) {
-            $method = $parts[0];
-        }
-
-        $c = new \ReflectionClass($klass);
-        $m = $c->getMethod($method);
-
-        return [$m->getFileName(), $m->getStartLine()];
+        $this->write(printDefectTrace($defect, $this->currentType));
     }
 }
diff --git a/src/Printer8.php b/src/Printer8.php
index f5b2336..ed51138 100644
--- a/src/Printer8.php
+++ b/src/Printer8.php
@@ -2,9 +2,48 @@
 
 namespace mheap\GithubActionsReporter;
 
+use PHPUnit\Framework\TestFailure;
+use PHPUnit\Framework\TestResult;
 use PHPUnit\TextUI\ResultPrinter;
 
+use function mheap\GithubActionsReporter\Functions\getCurrentType;
+use function mheap\GithubActionsReporter\Functions\printDefects;
+use function mheap\GithubActionsReporter\Functions\printDefectTrace;
+
 class Printer8 extends ResultPrinter
 {
-    use Trait8;
+    /**
+     * @var null|string
+     */
+    private $currentType;
+
+    protected function printHeader(TestResult $result): void
+    {
+    }
+
+    protected function writeProgress(string $progress): void
+    {
+    }
+
+    protected function printFooter(TestResult $result): void
+    {
+    }
+
+    protected function printDefects(array $defects, string $type): void
+    {
+        $this->currentType = (in_array($type, ['error', 'failure']) === true) ? 'error' : 'warning';
+
+        foreach ($defects as $i => $defect) {
+            $this->printDefect($defect, $i);
+        }
+    }
+
+    protected function printDefectHeader(TestFailure $defect, int $count): void
+    {
+    }
+
+    protected function printDefectTrace(TestFailure $defect): void
+    {
+        $this->write(printDefectTrace($defect, $this->currentType));
+    }
 }
diff --git a/src/Printer9.php b/src/Printer9.php
index 6b5cc7e..89c31bc 100644
--- a/src/Printer9.php
+++ b/src/Printer9.php
@@ -2,9 +2,46 @@
 
 namespace mheap\GithubActionsReporter;
 
+use PHPUnit\Framework\TestFailure;
+use PHPUnit\Framework\TestResult;
 use PHPUnit\TextUI\DefaultResultPrinter;
 
+use function mheap\GithubActionsReporter\Functions\printDefectTrace;
+
 class Printer9 extends DefaultResultPrinter
 {
-    use Trait8;
+    /**
+     * @var null|string
+     */
+    private $currentType;
+
+    protected function printHeader(TestResult $result): void
+    {
+    }
+
+    protected function writeProgress(string $progress): void
+    {
+    }
+
+    protected function printFooter(TestResult $result): void
+    {
+    }
+
+    protected function printDefects(array $defects, string $type): void
+    {
+        $this->currentType = (in_array($type, ['error', 'failure']) === true) ? 'error' : 'warning';
+
+        foreach ($defects as $i => $defect) {
+            $this->printDefect($defect, $i);
+        }
+    }
+
+    protected function printDefectHeader(TestFailure $defect, int $count): void
+    {
+    }
+
+    protected function printDefectTrace(TestFailure $defect): void
+    {
+        $this->write(printDefectTrace($defect, $this->currentType));
+    }
 }
diff --git a/src/Trait8.php b/src/Trait8.php
deleted file mode 100644
index 0ef2a2f..0000000
--- a/src/Trait8.php
+++ /dev/null
@@ -1,108 +0,0 @@
-<?php
-
-namespace mheap\GithubActionsReporter;
-
-use PHPUnit\Framework\TestResult;
-use PHPUnit\Framework\TestFailure;
-
-trait Trait8
-{
-    protected $currentType = null;
-
-    protected function printHeader(TestResult $result): void
-    {
-    }
-
-    protected function writeProgress(string $progress): void
-    {
-    }
-
-    protected function printFooter(TestResult $result): void
-    {
-    }
-
-    protected function printDefects(array $defects, string $type): void
-    {
-        $this->currentType = $type;
-
-        foreach ($defects as $i => $defect) {
-            $this->printDefect($defect, $i);
-        }
-    }
-
-    protected function printDefectHeader(TestFailure $defect, int $count): void
-    {
-    }
-
-    protected function printDefectTrace(TestFailure $defect): void
-    {
-        $e = $defect->thrownException();
-
-        $errorLines = array_filter(
-            explode("\n", (string)$e),
-            function ($l) {
-                return $l;
-            }
-        );
-
-        $error = end($errorLines);
-        $lineIndex = strrpos($error, ":");
-        $path = substr($error, 0, $lineIndex);
-        $line = substr($error, $lineIndex + 1);
-
-        list($reflectedPath, $reflectedLine) = $this->getReflectionFromTest(
-            $defect->getTestName()
-        );
-
-        if ($path !== $reflectedPath) {
-            $path = $reflectedPath;
-            $line = $reflectedLine;
-        }
-
-        $message = explode("\n", $defect->getExceptionAsString());
-        $message = implode('%0A', $message);
-
-        // Some messages might contain paths. Let's convert thost to relative paths too
-        $message = $this->relativePath($message);
-
-        $message = preg_replace('/%0A$/', '', $message);
-
-        $type = $this->getCurrentType();
-        $file = "file={$this->relativePath($path)}";
-        $line = "line={$line}";
-        $this->write("::{$type} $file,$line::{$message}\n");
-    }
-
-    protected function getCurrentType()
-    {
-        if (in_array($this->currentType, ['error', 'failure'])) {
-            return 'error';
-        }
-
-        return 'warning';
-    }
-
-    protected function relativePath(string $path)
-    {
-        $relative = str_replace(getcwd() . DIRECTORY_SEPARATOR, '', $path);
-        // Translate \ in to / for Windows
-        $relative = str_replace('\\', '/', $relative);
-        return $relative;
-    }
-
-    protected function getReflectionFromTest(string $name)
-    {
-        list($klass, $method) = explode('::', $name);
-
-        // Handle data providers
-        $parts = explode(" ", $method, 2);
-        if (count($parts) > 1) {
-            $method = $parts[0];
-        }
-
-        $c = new \ReflectionClass($klass);
-        $m = $c->getMethod($method);
-
-        return [$m->getFileName(), $m->getStartLine()];
-    }
-}
diff --git a/test/Unit/HelperFunctionTest.php b/test/Unit/HelperFunctionTest.php
new file mode 100644
index 0000000..ebb9bfb
--- /dev/null
+++ b/test/Unit/HelperFunctionTest.php
@@ -0,0 +1,64 @@
+<?php
+
+use mheap\GithubActionsReporter\Printer6;
+use mheap\GithubActionsReporter\Printer7;
+use mheap\GithubActionsReporter\Printer8;
+use mheap\GithubActionsReporter\Printer9;
+use PHPUnit\Framework\TestCase;
+
+use function mheap\GithubActionsReporter\Functions\determinePrinter;
+
+class HelperFunctionTest extends TestCase
+{
+    public function getInputsForVersionSelection()
+    {
+        yield 'invalid version' => [
+            'version' => 'aaa',
+            'expected' => null
+        ];
+
+        yield 'minor version 9.4' => [
+            'version' => '9.4',
+            'expected' => Printer9::class
+        ];
+
+        yield 'major version 9' => [
+            'version' => '9.0',
+            'expected' => Printer9::class
+        ];
+
+        yield 'minor version 9.1' => [
+            'version' => '9.1',
+            'expected' => Printer9::class
+        ];
+
+        yield 'minor version 8.2' => [
+            'version' => '8.2',
+            'expected' => Printer8::class
+        ];
+
+        yield 'patch version 7.0.1' => [
+            'version' => '7.0.1',
+            'expected' => Printer7::class
+        ];
+
+        yield 'minor version 6.5' => [
+            'version' => '6.5',
+            'expected' => Printer6::class
+        ];
+
+        yield 'minor version 5' => [
+            'version' => '5.0',
+            'expected' => null
+        ];
+    }
+    /**
+     * @dataProvider getInputsForVersionSelection()
+     */
+    public function testVersionSelector($version, $expected): void
+    {
+        $result = determinePrinter($version);
+
+        self::assertSame($expected, $result);
+    }
+}
diff --git a/test/states-test-phpunit6.phpt b/test/states-test-phpunit6.phpt
new file mode 100644
index 0000000..57b321e
--- /dev/null
+++ b/test/states-test-phpunit6.phpt
@@ -0,0 +1,29 @@
+--TEST--
+phpunit -c tests/_files/phpunit.xml tests/_files/PrinterStatesTest.php
+--SKIPIF--
+<?php
+require_once(dirname(dirname(__FILE__))).'/vendor/autoload.php';
+if (version_compare(PHPUnit\Runner\Version::id(), '7.0.0', '>=') === true) echo 'skip';
+?>
+--FILE--
+<?php
+$_SERVER['TERM']    = 'xterm';
+$_SERVER['argv'][1] = '-c';
+$_SERVER['argv'][2] = dirname(__FILE__).'/_files/phpunit.xml';
+$_SERVER['argv'][3] = '--colors=always';
+$_SERVER['argv'][4] = dirname(__FILE__).'/_files/PrinterStatesTest.php';
+
+require_once(dirname(dirname(__FILE__))).'/vendor/autoload.php';
+
+PHPUnit\TextUI\Command::main();
+?>
+--EXPECTF--
+%%VERSION%%
+
+::error file=test/_files/PrinterStatesTest.php,line=17::strpos() expects at least 2 parameters, 0 given
+::error file=test/_files/PrinterStatesTest.php,line=22::Error: Call to undefined method PrinterStatesTest::isMissing()
+::warning file=test/_files/PrinterStatesTest.php,line=32::This is a test warning
+::error file=test/_files/PrinterStatesTest.php,line=12::Failed asserting that false is true.
+::error file=test/_files/PrinterStatesTest.php,line=54::Failed asserting that false is true.
+::warning file=test/_files/PrinterStatesTest.php,line=37::This is a risky test
+::warning file=test/_files/PrinterStatesTest.php,line=40::This test did not perform any assertions
diff --git a/test/states-test.phpt b/test/states-test.phpt
index acf678e..329b543 100644
--- a/test/states-test.phpt
+++ b/test/states-test.phpt
@@ -1,5 +1,10 @@
 --TEST--
 phpunit -c tests/_files/phpunit.xml tests/_files/PrinterStatesTest.php
+--SKIPIF--
+<?php
+require_once(dirname(dirname(__FILE__))).'/vendor/autoload.php';
+if (version_compare(PHPUnit\Runner\Version::id(), '7.0.0', '>=') === false) echo 'skip';
+?>
 --FILE--
 <?php
 $_SERVER['TERM']    = 'xterm';