diff --git a/tests/files/README b/tests/files/README
index 79763c11..33ae9083 100644
--- a/tests/files/README
+++ b/tests/files/README
@@ -297,6 +297,9 @@
     Uncompressed Size bytes of output will have been produced but
     the LZMA2 decoder doesn't indicate end of stream.
 
+    bad-1-powerpc-1.xz has invalid PowerPC filter start offset (21) in
+    Filter Properties. XZ for Java <= 1.12 doesn't reject this file.
+
 
 3. Descriptions of Individual .lzma Files
 
diff --git a/tests/files/bad-1-powerpc-1.xz b/tests/files/bad-1-powerpc-1.xz
new file mode 100644
index 00000000..2c75a1aa
Binary files /dev/null and b/tests/files/bad-1-powerpc-1.xz differ