tests: Fix the make distcheck of libosmocore with the tests
diff --git a/tests/timer/Makefile.am b/tests/timer/Makefile.am
index d3decf5..062d81b 100644
--- a/tests/timer/Makefile.am
+++ b/tests/timer/Makefile.am
@@ -1,5 +1,6 @@
 INCLUDES = $(all_includes) -I$(top_srcdir)/include
 noinst_PROGRAMS = timer_test
+EXTRA_DIST = timer_test.ok
 
 timer_test_SOURCES = timer_test.c
 timer_test_LDADD = $(top_builddir)/src/libosmocore.la