diff --git a/tests/check.sh b/tests/check.sh
index 2b6682e..c6d413f 100755
--- a/tests/check.sh
+++ b/tests/check.sh
@@ -69,12 +69,12 @@ docker run --rm --entrypoint sh "$image" -c '
 
 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)"
+  output="$(docker run --rm -i --entrypoint sh "$image" -c '
+    cat >/tmp/font-probe.html
+    exec /opt/chromium/chrome --no-sandbox --headless=new --disable-gpu --disable-dev-shm-usage \
+      --fingerprint=1000 --fingerprint-platform="$1" \
+      --dump-dom "file:///tmp/font-probe.html#$1"
+  ' sh "$platform" <tests/font-probe.html 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