diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0860c814..0eed25b8 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,6 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        arch: [ x86_64 ]
         include:
           # UBUNTU 22.04 - CASTXML EPIC 0
           - os: ubuntu-22.04
@@ -21,7 +22,7 @@ jobs:
             python-version: "3.13"
             castxml-epic: 0
             cppstd: "-std=c++98"
-          
+
           - os: ubuntu-22.04
             compiler: clang++
             clang-version: 14
@@ -42,7 +43,7 @@ jobs:
             python-version: "3.13"
             castxml-epic: 1
             cppstd: "-std=c++98"
-  
+
           # UBUNTU 24.04 - CASTXML EPIC 0
           - os: ubuntu-24.04
             compiler: clang++
@@ -152,14 +153,26 @@ jobs:
           echo "compiler_path=/usr/bin/${{ matrix.compiler }}-${{ matrix.clang-version }}" >> tests/xml_generator.cfg
           echo "ccflags=${{ matrix.cppstd }}" >> tests/xml_generator.cfg
 
-      - name: Setup castxml for Linux
-        if: contains(matrix.os, 'ubuntu')
+      # ─── Setup CastXML for Linux x86_64 ──────────────────────────────
+      - name: Setup CastXML for Linux x86_64 (Ubuntu 24.04)
+        if: matrix.os == 'ubuntu-24.04' && matrix.arch == 'x86_64'
         run: |
-          wget -q -O - https://data.kitware.com/api/v1/file/hashsum/sha512/bdbb67a10c5f8d1b738cd19cb074f409d4803e8077cb8c1072ef4eaf738fa871a73643f9c8282d58cae28d188df842c82ad6620b6d590b0396a0172a27438dce/download | tar zxf - -C ~/
+          wget -q -O ~/castxml-ubuntu-24.04-x86_64.tar.gz https://github.com/CastXML/CastXMLSuperbuild/releases/download/v0.6.11.post1/castxml-ubuntu-24.04-x86_64.tar.gz
+          tar -xzf ~/castxml-ubuntu-24.04-x86_64.tar.gz -C ~/
+          chmod +x ~/castxml/bin/castxml
+
+      - name: Setup CastXML for Linux x86_64 (Ubuntu 22.04)
+        if: matrix.os == 'ubuntu-22.04' && matrix.arch == 'x86_64'
+        run: |
+          wget -q -O ~/castxml-ubuntu-22.04-x86_64.tar.gz https://github.com/CastXML/CastXMLSuperbuild/releases/download/v0.6.11.post1/castxml-ubuntu-22.04-x86_64.tar.gz
+          tar -xzf ~/castxml-ubuntu-22.04-x86_64.tar.gz -C ~/
+          chmod +x ~/castxml/bin/castxml
+
       - name: Setup castxml for Mac
         if: contains(matrix.os, 'macos')
         run: |
           wget -q -O - https://data.kitware.com/api/v1/file/hashsum/sha512/5d937e938f7b882a3a3e7941e68f8312d0898aaf2082e00003dd362b1ba70b98b0a08706a1be28e71652a6a0f1e66f89768b5eaa20e5a100592d5b3deefec3f0/download | tar zxf - -C ~/
+
       - name: Run tests
         run: |
           export PATH=~/castxml/bin:$PATH