diff --git a/Makefile b/Makefile
index 2000cd2e..3b920895 100644
--- a/Makefile
+++ b/Makefile
@@ -9,8 +9,7 @@ PICRIN_OBJS = \
 	$(PICRIN_SRCS:.c=.o)
 PICRIN_LIBS = \
 	piclib/picrin/macro.scm\
-	piclib/picrin/syntax-rules.scm\
-	piclib/picrin/test.scm
+	piclib/picrin/syntax-rules.scm
 
 CONTRIB_SRCS =
 CONTRIB_OBJS = $(CONTRIB_SRCS:.c=.o)
diff --git a/contrib/30.test/nitro.mk b/contrib/30.test/nitro.mk
new file mode 100644
index 00000000..d2c2199d
--- /dev/null
+++ b/contrib/30.test/nitro.mk
@@ -0,0 +1 @@
+CONTRIB_LIBS += $(wildcard contrib/30.test/*.scm)
diff --git a/piclib/picrin/test.scm b/contrib/30.test/test.scm
similarity index 97%
rename from piclib/picrin/test.scm
rename to contrib/30.test/test.scm
index f3fd920e..919a8b49 100644
--- a/piclib/picrin/test.scm
+++ b/contrib/30.test/test.scm
@@ -1,6 +1,6 @@
 (define-library (picrin test)
-  (import (picrin base)
-          (picrin syntax-rules))
+  (import (scheme base)
+          (scheme write))
 
   (define test-counter 0)
   (define counter 0)