diff --git a/gns3server/modules/base_manager.py b/gns3server/modules/base_manager.py
index 253c3f3b..b8e2512a 100644
--- a/gns3server/modules/base_manager.py
+++ b/gns3server/modules/base_manager.py
@@ -426,6 +426,8 @@ class BaseManager:
             # For non local server we disallow using absolute path outside image directory
             if Config.instance().get_section_config("Server").get("local", False) is False:
                 img_directory = self.config.get_section_config("Server").get("images_path", os.path.expanduser("~/GNS3/images"))
+                img_directory = force_unix_path(img_directory)
+                path = force_unix_path(path)
                 if len(os.path.commonprefix([img_directory, path])) < len(img_directory):
                     raise VMError("{} is not allowed on this remote server. Please use only a filename in {}.".format(path, img_directory))
 
@@ -443,8 +445,8 @@ class BaseManager:
 
         if not path:
             return ""
-        img_directory = self.get_images_directory()
-        path = self.get_abs_image_path(path)
+        img_directory = force_unix_path(self.get_images_directory())
+        path = force_unix_path(self.get_abs_image_path(path))
         if os.path.commonprefix([img_directory, path]) == img_directory:
             return os.path.relpath(path, img_directory)
         return path
diff --git a/tests/handlers/api/test_qemu.py b/tests/handlers/api/test_qemu.py
index 4dbf6dea..de512993 100644
--- a/tests/handlers/api/test_qemu.py
+++ b/tests/handlers/api/test_qemu.py
@@ -17,6 +17,7 @@
 
 import pytest
 import os
+import sys
 import stat
 from tests.utils import asyncio_patch
 from unittest.mock import patch
@@ -26,7 +27,10 @@ from gns3server.config import Config
 @pytest.fixture
 def fake_qemu_bin():
 
-    bin_path = os.path.join(os.environ["PATH"], "qemu-system-x86_64")
+    if sys.platform.startswith("win"):
+        bin_path = os.path.join(os.environ["PATH"], "qemu-system-x86_64w.exe")
+    else:
+        bin_path = os.path.join(os.environ["PATH"], "qemu-system-x86_64")
     with open(bin_path, "w+") as f:
         f.write("1")
     os.chmod(bin_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
diff --git a/tests/modules/test_manager.py b/tests/modules/test_manager.py
index adaf4d1d..feb15cbd 100644
--- a/tests/modules/test_manager.py
+++ b/tests/modules/test_manager.py
@@ -24,6 +24,7 @@ from unittest.mock import patch
 from gns3server.modules.vpcs import VPCS
 from gns3server.modules.qemu import Qemu
 from gns3server.modules.vm_error import VMError
+from gns3server.utils import force_unix_path
 
 
 @pytest.fixture(scope="function")
@@ -89,10 +90,10 @@ def test_create_vm_old_topology(loop, project, tmpdir, vpcs):
 
 def test_get_abs_image_path(qemu, tmpdir):
     os.makedirs(str(tmpdir / "QEMU"))
-    path1 = str(tmpdir / "test1.bin")
+    path1 = force_unix_path(str(tmpdir / "test1.bin"))
     open(path1, 'w+').close()
 
-    path2 = str(tmpdir / "QEMU" / "test2.bin")
+    path2 = force_unix_path(str(tmpdir / "QEMU" / "test2.bin"))
     open(path2, 'w+').close()
 
     with patch("gns3server.config.Config.get_section_config", return_value={"images_path": str(tmpdir)}):
@@ -106,11 +107,11 @@ def test_get_abs_image_path(qemu, tmpdir):
 def test_get_abs_image_path_non_local(qemu, tmpdir):
     path1 = tmpdir / "images" / "QEMU" / "test1.bin"
     path1.write("1", ensure=True)
-    path1 = str(path1)
+    path1 = force_unix_path(str(path1))
 
     path2 = tmpdir / "private" / "QEMU" / "test2.bin"
     path2.write("1", ensure=True)
-    path2 = str(path2)
+    path2 = force_unix_path(str(path2))
 
     # If non local we can't use path outside images directory
     with patch("gns3server.config.Config.get_section_config", return_value={"images_path": str(tmpdir / "images"), "local": False}):
@@ -126,10 +127,10 @@ def test_get_abs_image_path_non_local(qemu, tmpdir):
 
 def test_get_relative_image_path(qemu, tmpdir):
     os.makedirs(str(tmpdir / "QEMU"))
-    path1 = str(tmpdir / "test1.bin")
+    path1 = force_unix_path(str(tmpdir / "test1.bin"))
     open(path1, 'w+').close()
 
-    path2 = str(tmpdir / "QEMU" / "test2.bin")
+    path2 = force_unix_path(str(tmpdir / "QEMU" / "test2.bin"))
     open(path2, 'w+').close()
 
     with patch("gns3server.config.Config.get_section_config", return_value={"images_path": str(tmpdir)}):