diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 38e5cbb..ae6472e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ on:
 env:
   DOTNET_VERSION: '6.x'
   MATRIX_DIR: |
-    ( "Annotations/Annotations/",
+    '[ "Annotations/Annotations/",
       "Annotations/InkAnnotations/",
       "Annotations/LinkAnnotation/",
       "Annotations/PolygonAnnotations/",
@@ -95,7 +95,7 @@ env:
       "Text/RegexExtractText/",
       "Text/RegexTextSearch/",
       "Text/TextExtract/"
-    )
+    ]'
 
 jobs:
   run-samples-windows:
@@ -106,7 +106,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        dir: ${{env.MATRIX_DIR}}
+        dir: ${{ fromJSON(env.MATRIX_DIR) }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -164,7 +164,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        dir: ${{env.MATRIX_DIR}}
+        dir:  ${{ fromJSON(env.MATRIX_DIR) }}
     needs: [run-samples-windows]
     steps:
       - name: Checkout
@@ -234,7 +234,7 @@ jobs:
     runs-on: macos-14
     strategy:
       matrix:
-        dir: ${{env.MATRIX_DIR}}
+        dir:  ${{ fromJSON(env.MATRIX_DIR) }}
     needs: [run-samples-ubuntu]
     steps:
       - name: Checkout