diff --git a/source/toy_drive_system.c b/repl/toy_drive_system.c
similarity index 100%
rename from source/toy_drive_system.c
rename to repl/toy_drive_system.c
diff --git a/source/toy_drive_system.h b/repl/toy_drive_system.h
similarity index 100%
rename from source/toy_drive_system.h
rename to repl/toy_drive_system.h
diff --git a/test/makefile b/test/makefile
index dad42c4..7e6e934 100644
--- a/test/makefile
+++ b/test/makefile
@@ -4,7 +4,7 @@ IDIR +=. ../source ../repl
 CFLAGS +=$(addprefix -I,$(IDIR)) -g -Wall -W -Wno-unused-parameter -Wno-unused-function -Wno-unused-variable
 LIBS +=
 ODIR = obj
-TARGETS = $(wildcard ../source/*.c) $(wildcard ../repl/lib_*.c) ../repl/repl_tools.c
+TARGETS = $(wildcard ../source/*.c) $(wildcard ../repl/lib_*.c) ../repl/repl_tools.c ../repl/toy_drive_system.c
 TESTS = $(wildcard test_*.c)
 OBJ = $(addprefix $(ODIR)/,$(TARGETS:../source/%.c=%.o)) $(addprefix $(ODIR)/,$(TESTS:.c=.o))