diff --git a/tests/unittests/tests-rtt_rtc/Makefile.include b/tests/unittests/tests-rtt_rtc/Makefile.include
index 12c335ba09..27e91fc862 100644
--- a/tests/unittests/tests-rtt_rtc/Makefile.include
+++ b/tests/unittests/tests-rtt_rtc/Makefile.include
@@ -1,4 +1,5 @@
 USEMODULE += rtt_rtc
+USEMODULE += ztimer_no_periph_rtt
 
 CFLAGS += -DMOCK_RTT_FREQUENCY=32
 CFLAGS += -DMOCK_RTT_MAX_VALUE=0xFFFF