CI: Set BATS_LIB_PATH

.github/workflows/tests.yml

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fa3c854..506b026 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,10 +19,15 @@
     steps:
     - uses: actions/checkout@v2
     - run: ./script/install-bats.sh
-    - run: git clone --depth 1 https://github.com/bats-core/bats-support ../bats-support
+    
+    - uses: actions/checkout@v2
+      with:
+        repository: bats-core/bats-support
+        path: bats-support
+          
     # set PATh to ensure we use bats from our local installation (looking at you Mac Runner!)
     - name: bats test
       run: |
         PATH="$HOME/.local/bin:$PATH"
         bats -v
-        bats test
\ No newline at end of file
+        BATS_LIB_PATH="$PWD" bats test
\ No newline at end of file