diff --git a/.github/workflows/Dockerfile.buster b/.github/workflows/Dockerfile.buster
deleted file mode 100644
index 7c65ceef9c..0000000000
--- a/.github/workflows/Dockerfile.buster
+++ /dev/null
@@ -1,30 +0,0 @@
-FROM php:7.4-cli-buster
-ARG DEBIAN_FRONTEND=noninteractive
-
-COPY tests/python/requirements.txt /tmp/
-
-RUN echo "deb http://archive.debian.org/debian buster main" > /etc/apt/sources.list && \
-    echo "deb http://archive.debian.org/debian buster-updates main" >> /etc/apt/sources.list && \
-    echo "deb http://archive.debian.org/debian-security buster/updates main" >> /etc/apt/sources.list && \
-    apt-get update && \
-    apt-get install -y --no-install-recommends apt-utils ca-certificates gnupg wget lsb-release && \
-    echo "deb https://archive.debian.org/debian buster-backports main" >> /etc/apt/sources.list && \
-    echo "deb https://apt-archive.postgresql.org/pub/repos/apt buster-pgdg-archive main" > /etc/apt/sources.list.d/pgdg.list && \
-    wget -qO - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - && \
-    wget -qO - https://repo.mysql.com/RPM-GPG-KEY-mysql-2025 | apt-key add - && \
-    echo "deb http://repo.mysql.com/apt/debian buster mysql-8.0" > /etc/apt/sources.list.d/mysql.list && \
-    apt-get update && \
-    apt-get install -y --no-install-recommends \
-      git cmake-data=3.18* cmake=3.18* make g++ gperf netcat patch re2c automake libtool \
-      python3.7 python3-dev libpython3-dev python3-pip python3-setuptools python3-wheel mysql-server libmysqlclient-dev && \
-    pip3 install -r /tmp/requirements.txt && \
-    apt-get install -y --no-install-recommends libfmt-dev libgtest-dev libgmock-dev \
-      zlib1g-dev libldap-dev libkrb5-dev \
-      libzip-dev unzip libcurl4-openssl-dev libonig-dev libffi-dev \
-      libpq5=14.* postgresql-14 postgresql-server-dev-14 libpq-dev=14.* && \
-    docker-php-ext-install bcmath curl mbstring ffi && \
-    rm -rf /var/lib/apt/lists/* && \
-    curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer && \
-    ln -sf /usr/local/bin/php /usr/bin/php7.4
-
-RUN useradd -ms /bin/bash kitten
diff --git a/.github/workflows/debian.yml b/.github/workflows/debian.yml
index fd567ed2e0..e9837a97a0 100644
--- a/.github/workflows/debian.yml
+++ b/.github/workflows/debian.yml
@@ -17,11 +17,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - os: buster
-            compiler: g++
-            cpp: 17
-            asan: off
-            ubsan: off
           - os: bullseye
             compiler: g++
             cpp: 17