diff --git a/.github/workflows/Test_Build.yml b/.github/workflows/Test_Build.yml
index 288a9147..edfa9fa9 100644
--- a/.github/workflows/Test_Build.yml
+++ b/.github/workflows/Test_Build.yml
@@ -19,7 +19,7 @@ jobs:
           apt-get -y install python3 python3-pip python3-venv p7zip-full libarchive13
           python3 --version
           python3 -m venv venv
-          source venv/bin/activate
+          . ./venv/bin/activate
           python3 -m pip install --upgrade pip setuptools
 
       - name: Compile tests