diff --git a/test-pr.sh b/test-pr.sh
new file mode 100755
index 0000000000000..fc769ad88c26e
--- /dev/null
+++ b/test-pr.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+set -eo pipefail
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+usage() {
+	cat <<-EOUSAGE
+		usage: $0 [PR number] [repo[:tag]]
+		   ie: $0 1024
+		       $0 9001 debian php django
+		
+		This script builds and tests the specified pull request to official-images and
+		provides ouput in markdown for commenting on the pull request.
+	EOUSAGE
+}
+
+pull="$1"
+shift || { usage >&2 && exit 1; }
+
+url="https://github.com/docker-library/official-images/pull/$pull.patch"
+pat="$(curl -fsSL --compressed "$url")"
+commit="$(echo "$pat" | grep -E '^From [0-9a-f]+ ' | tail -n1 | cut -d' ' -f2)"
+
+if [ "$#" -eq 0 ]; then
+	IFS=$'\n'
+	files=( $(echo "$pat" | awk -F '/' '$1 == "+++ b" && $2 == "library" { print $3 }' | sort -u) )
+	unset IFS
+else
+	files=( "$@" )
+fi
+
+if [ ${#files[@]} -eq 0 ]; then
+	echo >&2 'no files in library/ changed in PR #'"$pull"
+	exit 0
+fi
+
+urls=()
+for f in "${files[@]}"; do
+	urls+=( "https://raw.githubusercontent.com/docker-library/official-images/$commit/library/$f" )
+done
+
+join() {
+	sep="$1"
+	arg1="$2"
+	shift 2
+	echo -n "$arg1"
+	[ $# -gt 0 ] && printf "${sep}%s" "$@"
+}
+
+echo 'Build test of' '#'"$pull"';' "$commit" '(`'"$(join '`, `' "${files[@]}")"'`):'
+failed=
+for url in "${urls[@]}"; do
+	echo
+	echo '```console'
+	echo '$ url="'"$url"'"'
+	echo '$ bashbrew build "$url"'
+	if ./bashbrew/bashbrew.sh build "$url"; then
+		echo '$ bashbrew list --uniq "$url" | xargs test/run.sh'
+		if ! ./bashbrew/bashbrew.sh list --uniq "$url" | xargs ./test/run.sh; then
+			failed=1
+		fi
+	else
+		failed=1
+	fi
+	echo '```'
+done
+if [ "$failed" ]; then
+	echo
+	echo 'There is at least one failure in the above build log.'
+fi