diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 383ee6bbc..540266f22 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -127,7 +127,9 @@ jobs:
   e2e-web:
     name: e2e-web
     runs-on: ubuntu-latest
-    timeout-minutes: 20
+    # The suite runs twice (WHIP, then the stream specs over fMP4 ingest);
+    # the first alone takes about 18 minutes.
+    timeout-minutes: 35
     needs: linux-amd64
     steps:
       - name: Check out code