diff --git a/Slim/CallableResolver.php b/Slim/CallableResolver.php
index a622dcbee..c1c351276 100644
--- a/Slim/CallableResolver.php
+++ b/Slim/CallableResolver.php
@@ -146,6 +146,9 @@ private function resolveSlimNotation(string $toResolve): array
             $instance = $this->container->get($class);
         } else {
             if (!class_exists($class)) {
+                if ($method) {
+                    $class .= '::' . $method . '()';
+                }
                 throw new RuntimeException(sprintf('Callable %s does not exist', $class));
             }
             $instance = new $class($this->container);
diff --git a/tests/CallableResolverTest.php b/tests/CallableResolverTest.php
index 8d739154b..27e0823a5 100644
--- a/tests/CallableResolverTest.php
+++ b/tests/CallableResolverTest.php
@@ -475,7 +475,7 @@ public function testMiddlewareFunctionNotFoundThrowException()
     public function testClassNotFoundThrowException()
     {
         $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('Callable Unknown does not exist');
+        $this->expectExceptionMessage('Callable Unknown::notFound() does not exist');
 
         /** @var ContainerInterface $container */
         $container = $this->containerProphecy->reveal();
@@ -486,7 +486,7 @@ public function testClassNotFoundThrowException()
     public function testRouteClassNotFoundThrowException()
     {
         $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('Callable Unknown does not exist');
+        $this->expectExceptionMessage('Callable Unknown::notFound() does not exist');
 
         /** @var ContainerInterface $container */
         $container = $this->containerProphecy->reveal();
@@ -497,7 +497,7 @@ public function testRouteClassNotFoundThrowException()
     public function testMiddlewareClassNotFoundThrowException()
     {
         $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('Callable Unknown does not exist');
+        $this->expectExceptionMessage('Callable Unknown::notFound() does not exist');
 
         /** @var ContainerInterface $container */
         $container = $this->containerProphecy->reveal();
@@ -508,7 +508,7 @@ public function testMiddlewareClassNotFoundThrowException()
     public function testCallableClassNotFoundThrowException()
     {
         $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('Callable Unknown does not exist');
+        $this->expectExceptionMessage('Callable Unknown::notFound() does not exist');
 
         /** @var ContainerInterface $container */
         $container = $this->containerProphecy->reveal();
@@ -519,7 +519,7 @@ public function testCallableClassNotFoundThrowException()
     public function testRouteCallableClassNotFoundThrowException()
     {
         $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('Callable Unknown does not exist');
+        $this->expectExceptionMessage('Callable Unknown::notFound() does not exist');
 
         /** @var ContainerInterface $container */
         $container = $this->containerProphecy->reveal();
@@ -530,7 +530,7 @@ public function testRouteCallableClassNotFoundThrowException()
     public function testMiddlewareCallableClassNotFoundThrowException()
     {
         $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('Callable Unknown does not exist');
+        $this->expectExceptionMessage('Callable Unknown::notFound() does not exist');
 
         /** @var ContainerInterface $container */
         $container = $this->containerProphecy->reveal();