diff --git a/dzgui/api/mods.py b/dzgui/api/mods.py
index 81b6d1c..4089859 100644
--- a/dzgui/api/mods.py
+++ b/dzgui/api/mods.py
@@ -49,6 +49,7 @@ def get_local_mods(workshop_path: Path) -> list[Path]:
     mods = [file for file in workshop_path.iterdir() if file.is_dir()]
     return mods
 
+
 def is_mission(path: Path) -> bool:
     # TODO: parse integrity of other files
     parent = path.parent.name
@@ -57,9 +58,10 @@ def is_mission(path: Path) -> bool:
     file = path / "init.c"
     return file.exists()
 
+
 def tokenize(mod: Path) -> dict[str, Any] | None:
     file = mod.joinpath("meta.cpp")
-    delimiter=r"\s*=\s*"
+    delimiter = r"\s*=\s*"
     modmeta = {}
     try:
         with open(file, "r", encoding="utf-8") as f:
@@ -76,6 +78,7 @@ def tokenize(mod: Path) -> dict[str, Any] | None:
         logger.critical(e)
         return None
 
+
 def get_mod_size(path: Path) -> float:
     s = 0
     for f in path.rglob("*"):
@@ -123,20 +126,27 @@ def _hash(uid: str, use_custom: bool = False) -> str:
     return prefix + md5.hexdigest()[:8]
 
 
-def remove_stale_signatures(config: Path, versions: Path) -> None:
+def remove_stale_signatures(
+    config: Path, versions: Path, ids: list[int] | None = None
+) -> None:
     if versions.is_file() is False:
         logger.warning("Creating new version signatures file")
         versions.touch()
         return
+
     path = lookup(config, Preferences.DEFAULT)
     steam_path = Path(path)
-    ids = get_local_mod_ids(steam_path)
+    if ids is None:
+        local_ids = get_local_mod_ids(steam_path)
+
     with open(versions, "r") as f:
         lines = f.readlines()
-    for line in lines:
-        uid = int(line.split(",")[0])
-        if uid not in ids:
-            lines.remove(line)
+
+    if ids is None:
+        lines = [line for line in lines if int(line.split(",")[0]) in local_ids]
+    else:
+        lines = [line for line in lines if int(line.split(",")[0]) not in ids]
+
     with open(versions, "w") as f:
         for line in lines:
             f.write(line)
diff --git a/dzgui/init/proc.py b/dzgui/init/proc.py
index 42647e9..1c97f74 100644
--- a/dzgui/init/proc.py
+++ b/dzgui/init/proc.py
@@ -1,6 +1,7 @@
 import psutil
 import subprocess
 import shutil
+import logging
 
 from warnings import deprecated
 
diff --git a/dzgui/managers/mods.py b/dzgui/managers/mods.py
index 87e9994..d609378 100644
--- a/dzgui/managers/mods.py
+++ b/dzgui/managers/mods.py
@@ -118,8 +118,7 @@ class ModManager:
             self.thread_man.increment_dialog()
             time.sleep(API_RATE_LIMIT)
 
-        iters = [_iter for mod, _iter in mods]
-        func = StoredFunc(self._on_mods_unsubbed, iters)
+        func = StoredFunc(self._on_mods_unsubbed, mods)
         self.thread_man.set_cleanup_func(func)
 
     def unsub_atomic_mod(self, mod: str) -> None:
@@ -146,18 +145,21 @@ class ModManager:
             pass
         time.sleep(API_RATE_LIMIT)
 
-    def _on_mods_unsubbed(self, iters: list[Gtk.TreeIter]) -> None:
+    def _on_mods_unsubbed(self, mod_iter: list[tuple[str, Gtk.TreeIter]]) -> None:
+        mods = [int(mod) for mod, _iter in mod_iter]
+        iters = [_iter for mod, _iter in mod_iter]
         if self.store is None:
             return
         for _iter in iters:
             self.store.remove(_iter)
-        remove_stale_signatures(self.prefs.paths.config, self.prefs.paths.version)
+        # TODO: process config path in called function
+        remove_stale_signatures(self.prefs.paths.config, self.prefs.paths.version, mods)
         model = self.treeview.get_model()
         if model is None:
             return
-        mods = len(model)
+        total_mods = len(model)
         msg = self.format_mod_statusbar()
-        self.emitter.emit("mods_updated", msg, mods)
+        self.emitter.emit("mods_updated", msg, total_mods)
 
     def uncolorize_mods(self) -> None:
         model = self.treeview.get_model()
diff --git a/tests/fixtures/dzg.versions b/tests/fixtures/dzg.versions
new file mode 100644
index 0000000..6ebdc35
--- /dev/null
+++ b/tests/fixtures/dzg.versions
@@ -0,0 +1,8 @@
+1559212036,1771519119
+1564026768,1770917948
+2545327648,1780174455
+2276010135,1756744083
+1654462998,1780501511
+3410710885,1752864732
+2918418331,1780413260
+3739934289,1780855136
diff --git a/tests/test_mod_signatures.py b/tests/test_mod_signatures.py
new file mode 100644
index 0000000..8aa5dd6
--- /dev/null
+++ b/tests/test_mod_signatures.py
@@ -0,0 +1,52 @@
+import pytest
+import shutil
+import tempfile
+
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+import dzgui.api.mods
+import dzgui.config.query
+
+from tests.fixtures import fixture_path
+
+if TYPE_CHECKING:
+    from dzgui.const.enums import Preferences
+
+pytestmark = pytest.mark.mods
+
+@pytest.fixture
+def versions() -> str:
+    return fixture_path("dzg.versions")
+
+@pytest.fixture
+def tmp() -> str:
+    with tempfile.NamedTemporaryFile(delete=False) as f:
+        tmp = f.name
+    return tmp
+
+def mock_local_ids(path: Path) -> list[int]:
+    return [3410710885, 3739934289]
+
+def mock_lookup(path: Path, prefs: "Preferences") -> str:
+    return ""
+
+def test_signatures(monkeypatch, tmp: str, versions: str) -> None:
+    ids = [1559212036, 1654462998]
+    shutil.copyfile(versions, tmp)
+    path = Path(tmp)
+    monkeypatch.setattr("dzgui.api.mods.lookup", mock_lookup)
+    dzgui.api.mods.remove_stale_signatures(path, path, ids)
+    with open(tmp, "r") as f:
+        lines = f.readlines()
+    assert ids not in lines
+
+def test_signatures_with_no_ids(monkeypatch, tmp: str, versions: str) -> None:
+    shutil.copyfile(versions, tmp)
+    path = Path(tmp)
+    monkeypatch.setattr("dzgui.api.mods.get_local_mod_ids", mock_local_ids)
+    monkeypatch.setattr("dzgui.api.mods.lookup", mock_lookup)
+    dzgui.api.mods.remove_stale_signatures(path, path)
+    with open(tmp, "r") as f:
+        lines = f.readlines()
+    assert lines == ["3410710885,1752864732\n", "3739934289,1780855136\n"]