diff --git a/tests/EPPConnectionTest.php b/tests/EPPConnectionTest.php
new file mode 100644
index 0000000..35c7fc5
--- /dev/null
+++ b/tests/EPPConnectionTest.php
@@ -0,0 +1,73 @@
+<?php
+namespace YOCLIB\EPP\Tests;
+
+use PHPUnit\Framework\TestCase;
+use YOCLIB\EPP\Connections\EPPBaseConnection;
+use YOCLIB\EPP\Connections\EPPTCPConnection;
+use YOCLIB\EPP\Elements\EPPEppElement;
+use YOCLIB\EPP\EPPDocumentHelper;
+use YOCLIB\EPP\Registries\SIDNTest;
+use function PHPUnit\Framework\assertEquals;
+
+class EPPConnectionTest extends TestCase {
+
+    public function testBaseConnection(){
+        $conn = new class extends EPPBaseConnection{
+
+            public function readXML(): ?string{
+                return '<readXML/>';
+            }
+
+            public function writeXML(string $xml): void{
+                assertEquals('<writeXML/>',$xml);
+            }
+
+            public function close(): bool{
+                return true;
+            }
+
+            public function isClosed(): bool{
+                return true;
+            }
+
+            public function open(): bool{
+                return true;
+            }
+        };
+
+        $this->assertEquals('<readXML/>',$conn->readXML());
+        $conn->writeXML('<writeXML/>');
+
+        $this->assertTrue($conn->isClosed());
+        $this->assertTrue($conn->open());
+        $this->assertTrue($conn->isClosed());
+        $this->assertTrue($conn->close());
+        $this->assertTrue($conn->isClosed());
+    }
+
+    /**
+     * This test performs a real request to the test servers of SIDN.
+     * @return void
+     */
+    public function testTCPConnection(){
+        $registry = new SIDNTest;
+
+        $conn = new EPPTCPConnection($registry);
+        $this->assertNotNull($conn);
+
+        $conn->writeXML('<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"><hello/></epp>');
+        $this->assertNotNull($conn);
+
+        $result = $conn->readXML();
+        $this->assertIsString($result);
+
+        $doc = EPPDocumentHelper::createEPPDocument();
+        $doc->loadXML($result);
+        $this->assertInstanceOf(EPPEppElement::class,$doc->documentElement);
+
+        $this->assertFalse($conn->isClosed());
+        $this->assertTrue($conn->close());
+        $this->assertTrue($conn->isClosed());
+    }
+
+}
\ No newline at end of file