diff --git a/.github/workflows/full-release-validation.yml b/.github/workflows/full-release-validation.yml
index 945186d9684c..27ea93d66d3c 100644
--- a/.github/workflows/full-release-validation.yml
+++ b/.github/workflows/full-release-validation.yml
@@ -140,7 +140,7 @@ env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
   GH_REPO: ${{ github.repository }}
   # Read retries and one-shot dispatch recovery share this classifier; dispatch POSTs never retry.
-  GH_TRANSIENT_SERVER_OR_NETWORK_PATTERN: "HTTP 5[0-9][0-9]|Server Error|error connecting to|context deadline exceeded|connection reset by peer|connection refused|TLS handshake timeout|i/o timeout|network is unreachable|(^|[^A-Za-z0-9_])EOF([^A-Za-z0-9_]|$)|ETIMEDOUT|ECONNRESET|EAI_AGAIN"
+  GH_TRANSIENT_SERVER_OR_NETWORK_PATTERN: "HTTP 5[0-9][0-9]|Server Error|invalid character .* looking for beginning of value|error connecting to|context deadline exceeded|connection reset by peer|connection refused|TLS handshake timeout|i/o timeout|network is unreachable|(^|[^A-Za-z0-9_])EOF([^A-Za-z0-9_]|$)|ETIMEDOUT|ECONNRESET|EAI_AGAIN"
   NODE_VERSION: "24.15.0"
 
 jobs:
diff --git a/test/scripts/package-acceptance-workflow.test.ts b/test/scripts/package-acceptance-workflow.test.ts
index faee64801c46..beb44333b2ff 100644
--- a/test/scripts/package-acceptance-workflow.test.ts
+++ b/test/scripts/package-acceptance-workflow.test.ts
@@ -1290,6 +1290,7 @@ describe("package acceptance workflow", () => {
       "could not create workflow dispatch event: HTTP 500: Failed to run workflow dispatch",
       "gh: HTTP 502",
       "500 Internal Server Error",
+      "invalid character '<' looking for beginning of value",
       "error connecting to api.github.com",
       "context deadline exceeded",
       "read: connection reset by peer",