diff --git a/dangerzone/global_common.py b/dangerzone/global_common.py
index a55d01d..d5619fd 100644
--- a/dangerzone/global_common.py
+++ b/dangerzone/global_common.py
@@ -13,7 +13,7 @@ import colorama
 
 from .container import convert
 from .settings import Settings
-from .util import get_resource_path
+from .util import get_resource_path, get_subprocess_startupinfo
 
 log = logging.getLogger(__name__)
 
@@ -50,14 +50,6 @@ class GlobalCommon(object):
             raise Exception(f"{runtime_name} is not installed")
         return runtime
 
-    def get_subprocess_startupinfo(self):  # type: ignore [no-untyped-def]
-        if platform.system() == "Windows":
-            startupinfo = subprocess.STARTUPINFO()
-            startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
-            return startupinfo
-        else:
-            return None
-
     def install_container(self) -> Optional[bool]:
         """
         Make sure the podman container is installed. Linux only.
@@ -71,7 +63,7 @@ class GlobalCommon(object):
         p = subprocess.Popen(
             [self.get_container_runtime(), "load"],
             stdin=subprocess.PIPE,
-            startupinfo=self.get_subprocess_startupinfo(),
+            startupinfo=get_subprocess_startupinfo(),
         )
 
         chunk_size = 10240
@@ -113,7 +105,7 @@ class GlobalCommon(object):
                 self.container_name,
             ],
             text=True,
-            startupinfo=self.get_subprocess_startupinfo(),
+            startupinfo=get_subprocess_startupinfo(),
         )
         found_image_id = found_image_id.strip()
 
@@ -127,7 +119,7 @@ class GlobalCommon(object):
             try:
                 subprocess.check_output(
                     [self.get_container_runtime(), "rmi", "--force", found_image_id],
-                    startupinfo=self.get_subprocess_startupinfo(),
+                    startupinfo=get_subprocess_startupinfo(),
                 )
             except:
                 log.warning("Couldn't delete old container image, so leaving it there")
diff --git a/dangerzone/gui/main_window.py b/dangerzone/gui/main_window.py
index 5a6a5b4..1f9a178 100644
--- a/dangerzone/gui/main_window.py
+++ b/dangerzone/gui/main_window.py
@@ -13,7 +13,7 @@ from PySide2 import QtCore, QtGui, QtWidgets
 from ..common import Common
 from ..container import convert
 from ..global_common import GlobalCommon
-from ..util import get_resource_path
+from ..util import get_resource_path, get_subprocess_startupinfo
 from .common import GuiCommon
 
 log = logging.getLogger(__name__)
@@ -171,7 +171,7 @@ class WaitingWidget(QtWidgets.QWidget):
                 [container_runtime, "image", "ls"],
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
-                startupinfo=self.global_common.get_subprocess_startupinfo(),
+                startupinfo=get_subprocess_startupinfo(),
             ) as p:
                 p.communicate()
                 if p.returncode != 0:
@@ -626,7 +626,7 @@ class ConvertWidget(QtWidgets.QWidget):
             subprocess.Popen(
                 f'explorer.exe /select,"{dest_filename_windows}"',
                 shell=True,
-                startupinfo=self.global_common.get_subprocess_startupinfo(),
+                startupinfo=get_subprocess_startupinfo(),
             )
 
         # Open
diff --git a/dangerzone/util.py b/dangerzone/util.py
index 612a3f3..67fdaf0 100644
--- a/dangerzone/util.py
+++ b/dangerzone/util.py
@@ -1,5 +1,6 @@
 import pathlib
 import platform
+import subprocess
 import sys
 
 
@@ -34,3 +35,12 @@ def get_version() -> str:
         # it doesn't need to know the version
         version = "unknown"
     return version
+
+
+def get_subprocess_startupinfo():  # type: ignore [no-untyped-def]
+    if platform.system() == "Windows":
+        startupinfo = subprocess.STARTUPINFO()
+        startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
+        return startupinfo
+    else:
+        return None
diff --git a/tests/test_global_common.py b/tests/test_global_common.py
deleted file mode 100644
index bf28433..0000000
--- a/tests/test_global_common.py
+++ /dev/null
@@ -1,19 +0,0 @@
-import os
-import platform
-from pathlib import Path
-
-import pytest
-
-import dangerzone.global_common
-
-
-@pytest.fixture
-def global_common():
-    return dangerzone.global_common.GlobalCommon()
-
-
-class TestGlobalCommon:
-    @pytest.mark.skipif(platform.system() != "Windows", reason="Windows-specific")
-    def test_get_subprocess_startupinfo(self, global_common):
-        startupinfo = global_common.get_subprocess_startupinfo()
-        self.assertIsInstance(startupinfo, subprocess.STARTUPINFO)
diff --git a/tests/test_util.py b/tests/test_util.py
index 042fd07..13cefe2 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -1,5 +1,8 @@
+import platform
 from pathlib import Path
 
+import pytest
+
 import dangerzone.util as util
 
 VERSION_FILE_NAME = "version.txt"
@@ -11,3 +14,9 @@ def test_get_resource_path():
     assert share_dir.samefile(
         resource_path
     ), f"{share_dir} is not the same file as {resource_path}"
+
+
+@pytest.mark.skipif(platform.system() != "Windows", reason="Windows-specific")
+def test_get_subprocess_startupinfo():
+    startupinfo = util.get_subprocess_startupinfo()
+    self.assertIsInstance(startupinfo, subprocess.STARTUPINFO)