diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dc4e038..d3ceb96 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -37,21 +37,25 @@ jobs:
       with:
         python-version: "3.12"
     - run: pip install -e ".[dev]"
-    - name: Download fixtures (GitHub Releases channel)
+    - name: Download fixtures (Releases via the API -- bypasses the asset-redirect CDN, which served stale entries after the WO79 republish)
+      env:
+        GH_TOKEN: ${{ github.token }}
       run: |
         mkdir -p fixtures && cd fixtures
-        BASE="https://github.com/interscript/interscript-models/releases/download"
-        curl -fsSL -o models-index.yaml "$BASE/index-v12/models-index.yaml"
-        curl -fsSL -o models-index.yaml.sha256 "$BASE/index-v12/models-index.yaml.sha256"
+        dl() { # dl <tag> <asset-name> <out>
+          local id=$(gh api repos/interscript/interscript-models/releases/tags/$1 --jq ".assets[] | select(.name==\"$2\") | .id")
+          gh api -H "Accept: application/octet-stream" repos/interscript/interscript-models/releases/assets/$id > "$3"
+        }
+        dl index-v12 models-index.yaml models-index.yaml
+        dl index-v12 models-index.yaml.sha256 models-index.yaml.sha256
         echo "$(cat models-index.yaml.sha256)" | sha256sum -c
         for v in urd-diac-base fas-diac-base urd-g2p-base; do
-          curl -fsSL -O "$BASE/index-v12/$v-vectors.json"
+          dl index-v12 $v-vectors.json $v-vectors.json
         done
         # the two single-zip models; urd-g2p (split parts) resolves
         # via the runtime resolver in a later matrix pass
         for m in urd-diac-base-1.0 fas-diac-base-1.0; do
-          url=$(sed -n "/^  $m:/,/^  [a-z]/p" models-index.yaml | grep -m1 'url:' | awk '{print $2}')
-          curl -fsSL -o "$m.zip" "$url"
+          dl $m $m-fp16.zip $m.zip
         done
     - name: Run the matrix
       run: |