diff --git a/src/host/c/makefile b/src/host/c/makefile
index 00ef36a5..311abc5f 100644
--- a/src/host/c/makefile
+++ b/src/host/c/makefile
@@ -1,5 +1,5 @@
 HOST = c
 HOST_COMPILER = $${C_HOST_COMPILER:-$(CC) -o}
 TEST_TAGS=c core variadics r4rs
-TEST_FEATURES ?= -f+ compression/lzss/2b, -e optimal, -f+ compression/lzss/2b -e optimal, -f+ c/gc/mark-sweep, -f+ c/gc/mark-sweep-dsw
+TEST_FEATURES ?= -f+ compression/lzss/2b, -e optimal, -f+ c/gc/mark-sweep, -f+ c/gc/mark-sweep-dsw
 include ../../makefile-common.mk