diff --git a/dotest b/dotest
new file mode 100755
index 0000000..b7aaa45
--- /dev/null
+++ b/dotest
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+if test $# -gt 0; then
+    run="$@"
+else
+    run="./ccmeta"
+fi
+
+die()
+{
+    diff $1 $2 | head -20
+    exit 1
+}
+
+for i in tests-std/*.c; do
+    echo $i
+    j="${i%.c}.out"
+    $run < $i > $j
+    cmp $i $j || die $i $j
+done
+
+for i in tests-gnu/*.c; do
+    echo $i
+    j="${i%.c}.out"
+    $run < $i > $j
+    cmp $i $j || die $i $j
+done
+
+for i in tests-err/*.c; do
+    echo $i
+    j="${i%.c}.out"
+    $run < $i > $j
+    cmp -s $i $j || echo failed
+done