--- /dev/null
+#!/bin/sh
+
+. "$COMMON/platform.sh"
+
+set -e
+
+if [ false ]; then
+ for seed in $(seq 100); do
+ datagen -g1000 -s$seed > file$seed
+ done
+
+ zstd --train -r . -o dict0 -qq
+
+ for seed in $(seq 101 200); do
+ datagen -g1000 -s$seed > file$seed
+ done
+
+ zstd --train -r . -o dict1 -qq
+
+ [ "$($MD5SUM < dict0)" != "$($MD5SUM < dict1)" ] || die "dictionaries must not match"
+
+ datagen -g1000 -s0 > file0
+fi
+
+set -v
+zstd files/0 -D dicts/0 -q
+zstd -t files/0.zst -D dicts/0
+zstd -t files/0.zst -D dicts/1 && die "Must fail" ||:
+zstd -t files/0.zst && die "Must fail" ||: