diff --git a/test/Makefile.am b/test/Makefile.am
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -25,6 +25,7 @@
 	test/kruskal_test \
 	test/maps_test \
 	test/max_matching_test \
+	test/min_cost_arborescence_test \
 	test/path_test \
 	test/preflow_test \
 	test/radix_sort_test \
@@ -66,6 +67,7 @@
 test_maps_test_SOURCES = test/maps_test.cc
 test_mip_test_SOURCES = test/mip_test.cc
 test_max_matching_test_SOURCES = test/max_matching_test.cc
+test_min_cost_arborescence_test_SOURCES = test/min_cost_arborescence_test.cc
 test_path_test_SOURCES = test/path_test.cc
 test_preflow_test_SOURCES = test/preflow_test.cc
 test_radix_sort_test_SOURCES = test/radix_sort_test.cc