diff --git a/tests/Makefile.am b/tests/Makefile.am
index 66ed8b6..4e6d6f3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -20,6 +20,7 @@ TESTS          += tree
 check_PROGRAMS  = $(TESTS)
 
 # Ignore warnings about unused result, in e.g. write()
-CPPFLAGS        = -D_GNU_SOURCE
+CFLAGS         += -Wno-unused-result
+CPPFLAGS       += -D_GNU_SOURCE
 LDADD           = -L../ ../libite.la
-LDFLAGS         = -static
+LDFLAGS        += -static