diff --git a/Dockerfile b/Dockerfile
index 0e9fd36..ed0295a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,12 +25,16 @@ LABEL org.opencontainers.image.revision="$OCI_REVISION" \
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
        ca-certificates \
+       fonts-croscore \
+       fonts-crosextra-caladea \
+       fonts-crosextra-carlito \
        fonts-dejavu-core \
        fonts-dejavu-extra \
        fonts-freefont-ttf \
        fonts-liberation \
        fonts-liberation-sans-narrow \
        fonts-noto-core \
+       fonts-noto-cjk \
        fonts-noto-color-emoji \
        fonts-ubuntu \
        fonts-urw-base35 \
diff --git a/tests/check.sh b/tests/check.sh
index f09ef5a..9d5603f 100755
--- a/tests/check.sh
+++ b/tests/check.sh
@@ -8,9 +8,6 @@ grep -q 'Xvfb :99' docker-entrypoint.sh
 ! grep -q -- '--headless' docker-entrypoint.sh
 grep -q -- '--no-sandbox' docker-entrypoint.sh
 grep -q 'TCP-LISTEN:' docker-entrypoint.sh
-for package in fonts-dejavu-core fonts-dejavu-extra fonts-freefont-ttf fonts-liberation fonts-liberation-sans-narrow fonts-noto-core fonts-noto-color-emoji fonts-ubuntu fonts-urw-base35; do
-  grep -q "       $package \\\\" Dockerfile
-done
 grep -q 'git.ipao.vip/rogee/fingerprint-chromium' .gitea/workflows/publish.yml
 grep -q 'ghcr.io/rogeecn/fingerprint-chromium' .github/workflows/publish.yml
 grep -q 'packages: write' .gitea/workflows/publish.yml
@@ -33,3 +30,55 @@ DOCKER_LOG="$docker_log" OCI_REVISION=test PUSH=true PATH="$tmpdir:$PATH" \
   ./scripts/build.sh registry.example/fingerprint-chromium > "$tmpdir/output"
 test "$(cat "$docker_log")" = "manifest inspect registry.example/fingerprint-chromium:1.2.3.4"
 grep -q 'skipping build and push' "$tmpdir/output"
+
+font_packages=(
+  fonts-croscore
+  fonts-crosextra-caladea
+  fonts-crosextra-carlito
+  fonts-dejavu-core
+  fonts-dejavu-extra
+  fonts-freefont-ttf
+  fonts-liberation
+  fonts-liberation-sans-narrow
+  fonts-noto-cjk
+  fonts-noto-color-emoji
+  fonts-noto-core
+  fonts-ubuntu
+  fonts-urw-base35
+)
+
+version="$(curl --fail --location --retry 3 --silent --show-error \
+  https://api.github.com/repos/adryfish/fingerprint-chromium/releases/latest \
+  | jq -er '.tag_name | select(test("^[0-9]+(\\.[0-9]+){3}$"))')"
+image="fingerprint-chromium-test:$version"
+CHROME_VERSION="$version" ./scripts/build.sh fingerprint-chromium-test
+
+docker run --rm --entrypoint dpkg-query "$image" --show "${font_packages[@]}" >/dev/null
+
+docker run --rm --entrypoint sh "$image" -c '
+  for font do
+    fc-match --format "%{family}\n" "$font" | grep -Fq "$font"
+  done
+' sh Arimo Tinos Cousine Caladea Carlito \
+  'Noto Sans CJK JP' 'Noto Sans CJK SC' 'Noto Sans CJK TC' \
+  'Noto Serif CJK JP' 'Noto Serif CJK SC' 'Noto Serif CJK TC'
+
+probe() {
+  local platform="$1" threshold="$2" output count
+  output="$(docker run --rm \
+    --volume "$PWD/tests/font-probe.html:/tmp/font-probe.html:ro" \
+    --entrypoint /opt/chromium/chrome "$image" \
+    --no-sandbox --headless=new --disable-gpu --disable-dev-shm-usage \
+    --fingerprint=1000 --fingerprint-platform="$platform" \
+    --dump-dom "file:///tmp/font-probe.html#$platform" 2>/dev/null)"
+  count="$(sed -n 's/.*data-count="\([0-9][0-9]*\)".*/\1/p' <<<"$output")"
+  [[ "$count" =~ ^[0-9]+$ && "$count" -ge "$threshold" ]] || {
+    printf '%s font probe: expected >= %s, got %s\n' "$platform" "$threshold" "${count:-none}" >&2
+    return 1
+  }
+  printf '%s font probe: %s\n' "$platform" "$count"
+}
+
+probe windows 22
+probe macos 24
+probe linux 27
diff --git a/tests/font-probe.html b/tests/font-probe.html
new file mode 100644
index 0000000..b8f81ec
--- /dev/null
+++ b/tests/font-probe.html
@@ -0,0 +1,47 @@
+<!doctype html>
+<output id="result"></output>
+<script>
+const fonts = {
+  windows: [
+    'Arial Black', 'Bahnschrift', 'Cambria', 'Candara', 'Cascadia Code',
+    'Comic Sans MS', 'Consolas', 'Constantia', 'Corbel', 'Ebrima',
+    'Franklin Gothic Medium', 'Gabriola', 'Gadugi', 'Georgia', 'Impact',
+    'Ink Free', 'Javanese Text', 'Lucida Console', 'Malgun Gothic',
+    'Microsoft YaHei', 'Palatino Linotype', 'Segoe UI', 'SimSun', 'Tahoma',
+    'Trebuchet MS', 'Verdana', 'Webdings', 'Wingdings', 'Yu Gothic'
+  ],
+  macos: [
+    'Academy Engraved LET', 'American Typewriter', 'Andale Mono',
+    'Apple Chancery', 'Apple Color Emoji', 'Apple Symbols', 'Avenir',
+    'Avenir Next', 'Baskerville', 'Big Caslon', 'Bradley Hand', 'Chalkboard',
+    'Chalkduster', 'Charter', 'Cochin', 'Copperplate', 'Didot', 'Futura',
+    'Geneva', 'Gill Sans', 'Helvetica Neue', 'Herculanum', 'Hoefler Text',
+    'Lucida Grande', 'Marker Felt', 'Menlo', 'Monaco', 'Optima', 'Papyrus',
+    'PingFang SC', 'Rockwell', 'SF Pro Display', 'Skia', 'Snell Roundhand',
+    'Songti SC', 'Times', 'Trattatello', 'Zapfino'
+  ],
+  linux: [
+    'Arimo', 'Caladea', 'Carlito', 'Cousine', 'DejaVu Math TeX Gyre',
+    'DejaVu Sans', 'DejaVu Sans Mono', 'DejaVu Serif', 'FreeMono', 'FreeSans',
+    'FreeSerif', 'Liberation Mono', 'Liberation Sans', 'Liberation Sans Narrow',
+    'Liberation Serif', 'Nimbus Mono PS', 'Nimbus Roman', 'Nimbus Sans',
+    'Nimbus Sans Narrow', 'Noto Color Emoji', 'Noto Sans', 'Noto Sans CJK JP',
+    'Noto Sans CJK SC', 'Noto Serif', 'Noto Serif CJK JP', 'Noto Serif CJK SC',
+    'Tinos', 'Ubuntu', 'Ubuntu Mono'
+  ]
+};
+const platform = location.hash.slice(1);
+const sample = 'mmmmmmmmmmlli';
+const bases = ['monospace', 'sans-serif', 'serif'];
+const context = document.createElement('canvas').getContext('2d');
+const widths = bases.map(base => {
+  context.font = `72px ${base}`;
+  return context.measureText(sample).width;
+});
+const detected = fonts[platform].filter(font => bases.some((base, index) => {
+  context.font = `72px "${font}",${base}`;
+  return context.measureText(sample).width !== widths[index];
+}));
+result.dataset.count = detected.length;
+result.textContent = `${platform}:${detected.join('|')}`;
+</script>