diff --git a/.github/workflows/ci_testing.yml b/.github/workflows/ci_testing.yml
index 28d254668..99e66bb56 100644
--- a/.github/workflows/ci_testing.yml
+++ b/.github/workflows/ci_testing.yml
@@ -41,6 +41,7 @@ jobs:
         run: |
           mkdir -p build
           cd build
+          export PROJ_DATA=$PWD/PROJ/data
           cmake -DCMAKE_BUILD_TYPE=RELEASE -DUSGSCSM_EXTERNAL_DEPS=OFF -DUSGSCSM_BUILD_DOCS=OFF ..
           cmake --build .
       - name: Test Package