chunker: fix md5all test for no-meta test remotes

.gitignore

@@ -14,3 +14,4 @@ fuzz-build.zip
 *.orig
 *.rej
 Thumbs.db
+__pycache__

backend/chunker/chunker_internal_test.go

@@ -695,7 +695,7 @@ func testMetadataInput(t *testing.T, f *Fs) {
 
 // Test that chunker refuses to change on objects with future/unknown metadata
 func testFutureProof(t *testing.T, f *Fs) {
-	if f.opt.MetaFormat == "none" {
+	if !f.useMeta {
 		t.Skip("this test requires metadata support")
 	}
 
@@ -868,6 +868,8 @@ func testMD5AllSlow(t *testing.T, f *Fs) {
 		"chunk_size":   "1P",
 		"name_format":  "*.#",
 		"hash_type":    "md5all",
+		"transactions": "rename",
+		"meta_format":  "simplejson",
 	})
 	chunkFs, ok := fsResult.(*Fs)
 	require.True(t, ok, "fs must be a chunker remote")