diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 85f7184a3..1c28e9f18 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -365,3 +365,8 @@ downstream-xmlstarlet:
   needs: [install]
   script:
     - sh .gitlab-ci/downstream-xmlstarlet.sh
+
+downstream-fuzzingharness:
+  image: gcr.io/oss-fuzz-base/base-builder@sha256:0241b5bf8a95a788807fd6632d544a0bae7289bd17f04b766dec79db7acab5f5
+  script:
+    - .gitlab-ci/downstream-harnessagent.sh
diff --git a/.gitlab-ci/downstream-harnessagent.sh b/.gitlab-ci/downstream-harnessagent.sh
index 4e8dccb10..3d812522a 100755
--- a/.gitlab-ci/downstream-harnessagent.sh
+++ b/.gitlab-ci/downstream-harnessagent.sh
@@ -2,15 +2,45 @@
 
 cd /src
 
-git clone https://github.com/zhangutah/oss-fuzz-harnessagent 
+export DEBIAN_FRONTEND=noninteractive
+export FUZZING_LANGUAGE=c
+
+git clone https://github.com/zhangutah/oss-fuzz-harnessagent -b filter_libxml2 /src/oss-fuzz
 
 git clone --depth=1 https://github.com/gnome/libxml2 && \
-  cd libxml2 && \
+  cd libxml2 && apt-get update && \
   apt-get install -y --no-install-recommends     make autoconf libtool pkg-config     zlib1g-dev liblzma-dev && \
   curl -LO http://mirrors.kernel.org/ubuntu/pool/main/a/automake-1.16/automake_1.16.5-1.3_all.deb &&     apt install ./automake_1.16.5-1.3_all.deb && \
   mv /src/oss-fuzz/projects/libxml2/all_harnesses/ /src/all_harnesses && \
-  cp /src/oss-fuzz/projects/libxml2/build.sh /src/build.sh
+  cp /src/oss-fuzz/projects/libxml2/build.sh /src/build.sh && \
+  compile || exit 1
 
-compile
+# Extract binary names from build.sh and run them
+BINARIES=$(grep -oP '(?<=-o \$OUT/)[^\s\\]+' /src/build.sh)
 
-/out/xmlparseurisafe -max_total_time=10
\ No newline at end of file
+for binary in $BINARIES; do
+  if [ -f "/out/$binary" ]; then
+    echo "Running $binary..."
+    savedcorpdir=/tmp/saved_corp_${binary}
+    mkdir -p $savedcorpdir
+    /out/$binary -runs=10000 $savedcorpdir /tmp/corpus >/dev/null 2>&1
+    EXIT_CODE=$?
+    
+    if [ $EXIT_CODE -ne 0 ]; then
+      echo "Binary $binary crashed with exit code $EXIT_CODE"
+      
+      # Find crash file in current directory
+      CRASH_FILE=$(find . -maxdepth 1 -name "crash-*" -type f | head -n 1)
+      
+      if [ -n "$CRASH_FILE" ]; then
+        echo "Crash sample: $CRASH_FILE"
+        echo "Base64 encoded crash sample:"
+        base64 "$CRASH_FILE"
+      fi
+      
+      exit $EXIT_CODE
+    fi
+  else
+    echo "Binary $binary not found, skipping..."
+  fi
+done
\ No newline at end of file