diff --git a/ci/test-downstream.sh b/ci/test-downstream.sh
new file mode 100755
index 0000000000..05cde45330
--- /dev/null
+++ b/ci/test-downstream.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# Test selected downstream crates
+
+set -e
+
+root=$(pwd)
+echo $root
+folder="../mdbook-downstream"
+projects=(
+    "https://github.com/tommilligan/mdbook-admonish"
+    "https://github.com/lambdalisue/rs-mdbook-alerts"
+)
+
+
+mkdir -p $folder
+
+for project in ${projects[*]}
+do
+    echo "project: $project"
+    name=$(basename $project)
+    cd "$root/$folder"
+    echo $name
+    if [ ! -d $name ]; then
+        git clone $project
+    fi
+
+    cd $name
+    git pull
+    cargo add mdbook --path $root
+    cargo test
+    git checkout .
+
+done
+