diff --git a/tests/DispatcherTest.php b/tests/DispatcherTest.php
index 1b2eaa4..f98ba5b 100644
--- a/tests/DispatcherTest.php
+++ b/tests/DispatcherTest.php
@@ -77,7 +77,7 @@ public function testCallMethodWithArrayTypeHintAndDocblock(): void
         $this->assertEquals('Hello World', $result);
         $this->assertEquals($this->calls, [new MethodCall('someMethodWithArrayTypeHint', [[new Argument('1'), new Argument('2')]])]);
     }
-  
+
     public function testCallMethodWithAdditionalProvidedParamsOnSomeMethodWithoutArgs()
     {
         $result = $this->dispatcher->dispatch((string) new Request(1, 'someMethodWithoutArgs', ['arg' => new Argument('whatever')]));
@@ -91,4 +91,11 @@ public function testCallMethodWithAdditionalProvidedParamsOnSomeMethodWithTypeHi
         $this->assertEquals('Hello World', $result);
         $this->assertEquals($this->calls, [new MethodCall('someMethodWithTypeHint', [new Argument('whatever')])]);
     }
+
+    public function testSomeMethodWithNullableTypeParamTag(): void
+    {
+        $result = $this->dispatcher->dispatch((string)new Request(1, 'someMethodWithNullableTypeParamTag', ['arg' => null]));
+        $this->assertEquals('Hello World', $result);
+        $this->assertEquals($this->calls, [new MethodCall('someMethodWithNullableTypeParamTag', [null])]);
+    }
 }
diff --git a/tests/Target.php b/tests/Target.php
index e9651ce..fd7afd9 100644
--- a/tests/Target.php
+++ b/tests/Target.php
@@ -58,4 +58,13 @@ public function someMethodWithArrayTypeHint(array $args): string
         $this->calls[] = new MethodCall('someMethodWithArrayTypeHint', func_get_args());
         return 'Hello World';
     }
+
+    /**
+     * @param ?string $arg
+     */
+    public function someMethodWithNullableTypeParamTag($arg): string
+    {
+        $this->calls[] = new MethodCall('someMethodWithNullableTypeParamTag', func_get_args());
+        return 'Hello World';
+    }
 }