diff --git a/diagrams/__init__.py b/diagrams/__init__.py
index be8e2174..8627de23 100644
--- a/diagrams/__init__.py
+++ b/diagrams/__init__.py
@@ -215,7 +215,6 @@ class Diagram:
             except OSError:
                 pass
             setdiagram(None)
-            setcluster(None)
 
     def _repr_png_(self):
         return self.dot.pipe(format="png")
diff --git a/file1.py b/file1.py
new file mode 100644
index 00000000..46f07282
--- /dev/null
+++ b/file1.py
@@ -0,0 +1,4 @@
+
+from diagrams import Diagram
+with Diagram(name="Test", show=False):
+    pass
diff --git a/file2.py b/file2.py
new file mode 100644
index 00000000..e6370e77
--- /dev/null
+++ b/file2.py
@@ -0,0 +1,12 @@
+
+from diagrams import Diagram
+from diagrams.aws.compute import EC2
+from diagrams.aws.database import RDS
+from diagrams.aws.network import ELB
+
+with Diagram("test_2", show=False, direction="TB"):
+    ELB("lb") >> [EC2("ワーカー１"),
+                  EC2("작업자 2를"),
+                  EC2("робітник 3"),
+                  EC2("worker4"),
+                  EC2("työntekijä 4")] >> RDS("events")
diff --git a/mcp-server/src/server.py b/mcp-server/src/server.py
index 7f75e966..09679c6f 100644
--- a/mcp-server/src/server.py
+++ b/mcp-server/src/server.py
@@ -44,9 +44,7 @@ def list_icons(provider_filter: str = None, service_filter: str = None):
 
     if service_filter not in provider_data:
         return {
-            "error": f"Service '{service_filter}' not found in '{provider_filter}'. Available: {
-                list(
-                    provider_data.keys())}"}
+            "error": f"Service '{service_filter}' not found in '{provider_filter}'. Available: {list(provider_data.keys())}"}
 
     return {service_filter: provider_data[service_filter]}
 
diff --git a/test_diagram.py b/test_diagram.py
new file mode 100644
index 00000000..46f07282
--- /dev/null
+++ b/test_diagram.py
@@ -0,0 +1,4 @@
+
+from diagrams import Diagram
+with Diagram(name="Test", show=False):
+    pass