diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 56e6bac10..ef90920f2 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -30,37 +30,26 @@ jobs:
           # Current stable version
           - version: '1'
             os: ubuntu-latest
-            arch: x64
             num_threads: 2
           # Minimum supported version
           - version: 'min'
             os: ubuntu-latest
-            arch: x64
             num_threads: 2
           # Single-threaded
           - version: '1'
             os: ubuntu-latest
-            arch: x64
             num_threads: 1
           # Minimum supported version, single-threaded
           - version: 'min'
             os: ubuntu-latest
-            arch: x64
             num_threads: 1
-          # x86
-          - version: '1'
-            os: ubuntu-latest
-            arch: x86
-            num_threads: 2
           # Windows
           - version: '1'
             os: windows-latest
-            arch: x64
             num_threads: 2
           # macOS
           - version: '1'
             os: macos-latest
-            arch: aarch64
             num_threads: 2
         test_group:
           - Group1
@@ -72,7 +61,6 @@ jobs:
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.runner.version }}
-          arch: ${{ matrix.runner.arch }}
 
       - uses: julia-actions/cache@v2
 
diff --git a/.github/workflows/IntegrationTest.yml b/.github/workflows/IntegrationTest.yml
index c0389bb12..87c33e468 100644
--- a/.github/workflows/IntegrationTest.yml
+++ b/.github/workflows/IntegrationTest.yml
@@ -25,7 +25,6 @@ jobs:
       - uses: julia-actions/setup-julia@v2
         with:
           version: 1
-          arch: x64
       - uses: julia-actions/julia-buildpkg@v1
       - name: Clone Downstream
         uses: actions/checkout@v4
diff --git a/.github/workflows/JuliaPre.yml b/.github/workflows/JuliaPre.yml
index a9118a4bf..45443d183 100644
--- a/.github/workflows/JuliaPre.yml
+++ b/.github/workflows/JuliaPre.yml
@@ -21,7 +21,6 @@ jobs:
       - uses: julia-actions/setup-julia@v2
         with:
           version: 'pre' # pre-release
-          arch: x64
       - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1