diff --git a/internal/shortcut/chat/file_replace.go b/internal/shortcut/chat/file_replace.go
index 98560989..6570c725 100644
--- a/internal/shortcut/chat/file_replace.go
+++ b/internal/shortcut/chat/file_replace.go
@@ -8,6 +8,4 @@ package chat
 
 import "os"
 
-func replaceFileAtomically(source, target string) error {
-	return os.Rename(source, target)
-}
+var replaceFileAtomically = os.Rename
diff --git a/internal/shortcut/chat/file_replace_windows.go b/internal/shortcut/chat/file_replace_windows.go
index 3bdcabdd..9c208ccb 100644
--- a/internal/shortcut/chat/file_replace_windows.go
+++ b/internal/shortcut/chat/file_replace_windows.go
@@ -8,6 +8,4 @@ package chat
 
 import "golang.org/x/sys/windows"
 
-func replaceFileAtomically(source, target string) error {
-	return windows.Rename(source, target)
-}
+var replaceFileAtomically = windows.Rename