diff --git a/spec/awful/completion_spec.lua b/spec/awful/completion_spec.lua
index f97e42ec8..0a087c5c1 100644
--- a/spec/awful/completion_spec.lua
+++ b/spec/awful/completion_spec.lua
@@ -15,6 +15,36 @@ if not has_bash and not has_zsh then
     return
 end
 
+local orig_path_env = GLib.getenv("PATH")
+local required_commands = {"bash", "zsh", "sort"}
+
+-- Change PATH
+local function get_test_path_dir()
+    local test_path = Gio.File.new_tmp("awesome-tests-path-XXXXXX")
+    test_path:delete()
+    test_path:make_directory()
+
+    for _, cmd in ipairs(required_commands) do
+        local target = GLib.find_program_in_path(cmd)
+        if target then
+            test_path:get_child(cmd):make_symbolic_link(target)
+        end
+    end
+
+    test_path = test_path:get_path()
+    GLib.setenv("PATH", test_path, true)
+    return test_path
+end
+
+-- Reset PATH
+local function remove_test_path_dir(test_path)
+    GLib.setenv("PATH", orig_path_env, true)
+    for _, cmd in ipairs(required_commands) do
+        os.remove(test_path .. "/" .. cmd)
+    end
+    os.remove(test_path)
+end
+
 local test_dir
 
 --- Get and create a temporary test dir based on `pat`, where %d gets replaced by