diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b2ac7d659..1e1fa2525 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
-      # Build for CentOS7
+      # Build for CentOS 7
       - name: Build on CentOS7, baseline
         run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-baseline .
       - name: Build on CentOS7, with SRT
@@ -23,7 +23,10 @@ jobs:
         run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-no-asm .
       - name: Build on CentOS7, C++98, no FFmpeg
         run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-ansi-no-ffmpeg .
-      # Build for CentOS8
+      # Build for CentOS 6
+      - name: Build on CentOS6, baseline
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos6-baseline .
+      # Build for CentOS 8
       - name: Build on CentOS8, baseline
         run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos8-baseline .
       - name: Build on CentOS8, with SRT
diff --git a/trunk/Dockerfile.builds b/trunk/Dockerfile.builds
index ea91ac2c6..73f113893 100644
--- a/trunk/Dockerfile.builds
+++ b/trunk/Dockerfile.builds
@@ -19,6 +19,11 @@ FROM ossrs/srs:dev AS centos7-ansi-no-ffmpeg
 COPY . /srs
 RUN cd /srs/trunk && ./configure --jobs=2 --cxx11=off --cxx14=off --ffmpeg-fit=off && make -j2
 
+########################################################
+FROM ossrs/srs:dev6 AS centos6-baseline
+COPY . /srs
+RUN cd /srs/trunk && ./configure --jobs=2 && make -j2
+
 ########################################################
 FROM ossrs/srs:dev8 AS centos8-baseline
 COPY . /srs