diff --git a/composer.json b/composer.json
index 2712eb8..92c6e73 100755
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "codedungeon/phpunit-result-printer",
-  "version": "0.16.0",
+  "version": "0.16.1",
   "description": "PHPUnit Pretty Result Printer",
   "keywords": [
     "phpunit",
@@ -37,7 +37,10 @@
   "scripts": {
     "coverage-report": "open ./coverage/index.html",
     "test": "vendor/bin/phpunit --colors=always",
-    "test-coverage": "./vendor/bin/phpunit --colors=always --testsuite Unit --coverage-html coverage",
+    "test-coverage": [
+      "./vendor/bin/phpunit --colors=always --testsuite Unit --coverage-html coverage",
+      "open ./coverage/index.html"
+    ],
     "test-ci": "vendor/bin/phpunit -c phpunit.ci.xml",
     "test-watch": "vendor/bin/phpunit-watcher watch --testsuite Unit  < /dev/tty",
     "watch-tickets": "vendor/bin/phpunit-watcher watch --testsuite Tickets  < /dev/tty"
diff --git a/src/ResultPrinter5.php b/src/ResultPrinter5.php
index 787bd59..814b6dc 100644
--- a/src/ResultPrinter5.php
+++ b/src/ResultPrinter5.php
@@ -5,11 +5,13 @@
 use PHPUnit_Framework_Test;
 use PHPUnit_TextUI_ResultPrinter;
 
-class ResultPrinter5 extends PHPUnit_TextUI_ResultPrinter
-{
-    public function startTest(PHPUnit_Framework_Test $test)
+if (class_exists(PHPUnit_TextUI_ResultPrinter::class)) {
+    class ResultPrinter5 extends PHPUnit_TextUI_ResultPrinter
     {
-        $this->className = \get_class($test);
-        parent::startTest($test);
+        public function startTest(PHPUnit_Framework_Test $test)
+        {
+            $this->className = \get_class($test);
+            parent::startTest($test);
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/src/ResultPrinter6.php b/src/ResultPrinter6.php
index 5d5b827..7b67df1 100644
--- a/src/ResultPrinter6.php
+++ b/src/ResultPrinter6.php
@@ -3,23 +3,26 @@
 namespace Codedungeon\PHPUnitPrettyResultPrinter;
 
 use PHPUnit\Framework\Test;
+use PHPUnit\Runner\Version;
 use PHPUnit\TextUI\ResultPrinter;
 
-class ResultPrinter6 extends ResultPrinter
-{
-    public function startTest(Test $test)
+if (version_compare(Version::series(), '6.99.99', '<=')) {
+    class ResultPrinter6 extends ResultPrinter
     {
-        $this->className = \get_class($test);
-        parent::startTest($test);
-    }
+        public function startTest(Test $test)
+        {
+            $this->className = \get_class($test);
+            parent::startTest($test);
+        }
 
-    protected function writeProgress($progress)
-    {
-        $this->writeProgressEx($progress);
-    }
+        protected function writeProgress($progress)
+        {
+            $this->writeProgressEx($progress);
+        }
 
-    protected function writeProgressWithColor($progress, $buffer)
-    {
-        $this->writeProgressWithColorEx($progress, $buffer);
+        protected function writeProgressWithColor($progress, $buffer)
+        {
+            $this->writeProgressWithColorEx($progress, $buffer);
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/src/ResultPrinter70.php b/src/ResultPrinter70.php
index 1b32082..41e3536 100644
--- a/src/ResultPrinter70.php
+++ b/src/ResultPrinter70.php
@@ -3,23 +3,29 @@
 namespace Codedungeon\PHPUnitPrettyResultPrinter;
 
 use PHPUnit\Framework\Test;
+use PHPUnit\Runner\Version;
 use PHPUnit\TextUI\ResultPrinter;
 
-class ResultPrinter70 extends ResultPrinter
-{
-    public function startTest(Test $test): void
-    {
-        $this->className = \get_class($test);
-        parent::startTest($test);
-    }
+$low = version_compare(Version::series(), '7.0', '>=');
+$high = version_compare(Version::series(), '7.0.99', '<=');
 
-    protected function writeProgress($progress): void
+if ($low && $high) {
+    class ResultPrinter70 extends ResultPrinter
     {
-        $this->writeProgressEx($progress);
-    }
+        public function startTest(Test $test): void
+        {
+            $this->className = \get_class($test);
+            parent::startTest($test);
+        }
 
-    protected function writeProgressWithColor($progress, $buffer): void
-    {
-        $this->writeProgressWithColorEx($progress, $buffer);
+        protected function writeProgress($progress): void
+        {
+            $this->writeProgressEx($progress);
+        }
+
+        protected function writeProgressWithColor($progress, $buffer): void
+        {
+            $this->writeProgressWithColorEx($progress, $buffer);
+        }
     }
 }
diff --git a/src/ResultPrinter71.php b/src/ResultPrinter71.php
index 57e8dff..0a0f453 100644
--- a/src/ResultPrinter71.php
+++ b/src/ResultPrinter71.php
@@ -3,23 +3,32 @@
 namespace Codedungeon\PHPUnitPrettyResultPrinter;
 
 use PHPUnit\Framework\Test;
+use PHPUnit\Runner\Version;
 use PHPUnit\TextUI\ResultPrinter;
 
-class ResultPrinter71 extends ResultPrinter
-{
-    public function startTest(Test $test): void
-    {
-        $this->className = \get_class($test);
-        parent::startTest($test);
-    }
+$low = version_compare(Version::series(), '7.1', '>=');
+$high = true; // version_compare(Version::series(),'7.1.99','<=');
 
-    protected function writeProgress(string $progress): void
-    {
-        $this->writeProgressEx($progress);
-    }
+if ($low && $high) {
 
-    protected function writeProgressWithColor(string $progress, string $buffer): void
+
+    class ResultPrinter71 extends ResultPrinter
     {
-        $this->writeProgressWithColorEx($progress, $buffer);
+        public function startTest(Test $test): void
+        {
+            $this->className = \get_class($test);
+            parent::startTest($test);
+        }
+
+        protected function writeProgress(string $progress): void
+        {
+            $this->writeProgressEx($progress);
+        }
+
+        protected function writeProgressWithColor(string $progress, string $buffer): void
+        {
+            $this->writeProgressWithColorEx($progress, $buffer);
+        }
     }
-}
+
+}
\ No newline at end of file