diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7551ba3e2..206244408 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -266,13 +266,29 @@ jobs:
         chmod a+x builder
         ./builder build -p ${{ env.PACKAGE_NAME }}
 
-  macos-debug:
+  macos-debug-tsan:
+    runs-on: macos-14 # latest
+    strategy:
+      fail-fast: false
+      matrix:
+        eventloop: ["kqueue", "dispatch_queue"]
+    steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    - name: Build ${{ env.PACKAGE_NAME }} + consumers
+      run: |
+        python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
+        chmod a+x builder
+        ./builder build -p ${{ env.PACKAGE_NAME }} --cmake-extra=-DAWS_USE_APPLE_NETWORK_FRAMEWORK=${{ matrix.eventloop == 'dispatch_queue' && 'ON' || 'OFF' }} --cmake-extra=-DENABLE_SANITIZERS=ON --cmake-extra=-DSANITIZERS=",thread" --config Debug
+
+  macos-debug-asan:
     runs-on: macos-14 # latest
     strategy:
       fail-fast: false
       matrix:
         eventloop: ["kqueue", "dispatch_queue"]
-        sanitizers: [",thread", ",address,undefined"]
     steps:
     - uses: aws-actions/configure-aws-credentials@v4
       with:
@@ -282,7 +298,7 @@ jobs:
       run: |
         python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
         chmod a+x builder
-        ./builder build -p ${{ env.PACKAGE_NAME }} --cmake-extra=-DAWS_USE_APPLE_NETWORK_FRAMEWORK=${{ matrix.eventloop == 'dispatch_queue' && 'ON' || 'OFF' }} --cmake-extra=-DENABLE_SANITIZERS=ON --cmake-extra=-DSANITIZERS="${{ matrix.sanitizers }}" --config Debug
+        ./builder build -p ${{ env.PACKAGE_NAME }} --cmake-extra=-DAWS_USE_APPLE_NETWORK_FRAMEWORK=${{ matrix.eventloop == 'dispatch_queue' && 'ON' || 'OFF' }} --cmake-extra=-DENABLE_SANITIZERS=ON --cmake-extra=-ASAN_OPTIONS=detect_leaks=1 --cmake-extra=-DSANITIZERS=",address,undefined" --config Debug
 
   freebsd:
     runs-on: ubuntu-24.04  # latest