diff --git a/tests/bonsai/str.mk b/tests/bonsai/stris.mk
similarity index 51%
rename from tests/bonsai/str.mk
rename to tests/bonsai/stris.mk
index 38ad9ca..7d93b6d 100755
--- a/tests/bonsai/str.mk
+++ b/tests/bonsai/stris.mk
@@ -7,14 +7,19 @@
 
 .PRAGMA: command_comment
 
-.PHONY: str_tests
-str_tests: str_help str_isalpha
+.PHONY: stris_tests
+stris_tests: stris_help stris_7 stris_b
 
-.PHONY: str_help
-str_help: $(BIN)/str
-	! $(BIN)/str -h
+.PHONY: stris_help
+stris_help: $(BIN)/stris
+	! $(BIN)/stris -h
 
-.PHONY: str_isalpha
-str_isalpha: $(BIN)/str
-	$(BIN)/str   isalpha c
-	! $(BIN)/str isalpha 3
+.PHONY: stris_7
+stris_7: $(BIN)/stris
+	$(BIN)/stris   -7 !1Aa' '
+	! $(BIN)/stris -7 今日は
+
+.PHONY: stris_b
+stris_b: $(BIN)/stris
+	$(BIN)/stris   -b "$(printf ' \t\v\r\n')"
+	! $(BIN)/stris -b !1Aa