diff --git a/.github/workflows/test_script.yml b/.github/workflows/test_script.yml
index e9fc3ba..89d1756 100755
--- a/.github/workflows/test_script.yml
+++ b/.github/workflows/test_script.yml
@@ -36,7 +36,16 @@ jobs:
 
       - name: Install tmux on Ubuntu
         if: startsWith(matrix.os, 'ubuntu')
-        run: sudo apt-get install tmux fd fzf
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y tmux
+          sudo apt-get install -y fd-find
+          sudo apt-get install -y fzf
+
+      - name: Set up tmux environment
+        run: |
+          tmux new-session -d -s mysession
+          tmux new-window -t mysession:1 -n mywindow
 
       - name: Test aactivator.py
         run: |