diff --git a/_files/test.sh b/_files/test.sh
new file mode 100644
index 0000000..338355b
--- /dev/null
+++ b/_files/test.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/bash
+
+for nb in *.md; 
+do
+    if [ "$nb" = "README.md" ] || [ "$nb" = "introduction.md" ] || [ ${nb} = "CHANGES.md" ] ; then 
+        continue
+    fi 
+    nbroot=$(echo "${nb}" | cut -d. -f1)
+    printf "================\nProcessing ${nbroot}\n"
+    date
+    if [ ! -d "${nbroot}.out" ]; then
+        mkdir "${nbroot}.out"
+    fi
+    cd "${nbroot}.out"
+    if [ -f "00_success" ]; then
+        echo "Found previous successful run;  skipping" 
+        cd ..
+        continue
+    elif [ -f "00_failure" ]; then 
+        echo "Found previous failed run;  skipping" 
+        cd ..
+        continue
+    fi
+    cp "../${nb}" . || (echo "Cannot find ../${nb}; exiting" ; exit 1)
+    jupytext --execute --to notebook "${nb}" "${nbroot}.ipynb" > output.log 2>&1 || (echo "ERROR:  Exit Code: $?" ; tail output.log ; touch 00_failure; exit 1)
+    touch 00_success
+    cd ..
+done
+date
+echo "\n============\nDone"