diff --git a/gns3server/controller/project.py b/gns3server/controller/project.py
index 5fe751cec..7f3c6d4a0 100644
--- a/gns3server/controller/project.py
+++ b/gns3server/controller/project.py
@@ -51,6 +51,12 @@ class Project:
         self._name = name
         self._auto_start = False
         self._status = status
+
+        # Disallow overwrite of existing project
+        if project_id is None and path is not None:
+            if os.path.exists(path):
+                raise aiohttp.web.HTTPForbidden(text="The path {} already exist.".format(path))
+
         if project_id is None:
             self._id = str(uuid4())
         else:
@@ -187,7 +193,6 @@ class Project:
                     return name
         raise aiohttp.web.HTTPConflict(text="A node name could not be allocated (node limit reached?)")
 
-
     def has_allocated_node_name(self, name):
         """
         Returns either a node name is already allocated or not.
diff --git a/tests/controller/test_project.py b/tests/controller/test_project.py
index 07c737465..8b300486b 100644
--- a/tests/controller/test_project.py
+++ b/tests/controller/test_project.py
@@ -56,6 +56,17 @@ def test_path(tmpdir):
         assert os.path.exists(os.path.join(directory, p.id))
 
 
+def test_path_exist(tmpdir):
+    """
+    Should raise an error when you try to owerwrite
+    an existing project
+    """
+    os.makedirs(str(tmpdir / "demo"))
+    with pytest.raises(aiohttp.web.HTTPForbidden):
+        p = Project(name="Test", path=str(tmpdir / "demo"))
+
+
+
 def test_init_path(tmpdir):
 
     p = Project(path=str(tmpdir), project_id=str(uuid4()), name="Test")
@@ -69,8 +80,8 @@ def test_changing_path_with_quote_not_allowed(tmpdir):
 
 
 def test_captures_directory(tmpdir):
-    p = Project(path=str(tmpdir), name="Test")
-    assert p.captures_directory == str(tmpdir / "project-files" / "captures")
+    p = Project(path=str(tmpdir / "capturestest"), name="Test")
+    assert p.captures_directory == str(tmpdir / "capturestest" / "project-files" / "captures")
     assert os.path.exists(p.captures_directory)