diff --git a/src/Fakes/BausteinFake.php b/src/Fakes/BausteinFake.php
index 3a9693b..67119a1 100644
--- a/src/Fakes/BausteinFake.php
+++ b/src/Fakes/BausteinFake.php
@@ -24,4 +24,15 @@ class BausteinFake extends Fake {
         return $this;
     }
 
+    public function failsToFetch(): self
+    {
+        Http::fake(function($request) {
+            if ($request->url() === "https://nami.dpsg.de/ica/rest/module/baustein") {
+                return $this->errorResponse('error');
+            }
+        });
+
+        return $this;
+    }
+
 }
diff --git a/tests/Unit/BausteinTest.php b/tests/Unit/BausteinTest.php
index def78a8..4e5a98d 100644
--- a/tests/Unit/BausteinTest.php
+++ b/tests/Unit/BausteinTest.php
@@ -35,4 +35,13 @@ class BausteinTest extends TestCase
         $this->assertEquals('abc', $courses->first()->name);
     }
 
+    public function test_throw_exception_when_baustein_fetching_fails(): void
+    {
+        $this->expectException(NamiException::class);
+        Auth::success(12345, 'secret');
+        app(BausteinFake::class)->failsToFetch();
+
+        Nami::login(12345, 'secret')->courses();
+    }
+
 }