diff --git a/test/Makefile.am b/test/Makefile.am
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -13,11 +13,13 @@
 	test/digraph_test \
         test/dim_test \
 	test/graph_test \
+	test/kruskal_test \
         test/maps_test \
         test/random_test \
         test/path_test \
         test/test_tools_fail \
-        test/test_tools_pass
+        test/test_tools_pass \
+	test/unionfind_test
 
 TESTS += $(check_PROGRAMS)
 XFAIL_TESTS += test/test_tools_fail$(EXEEXT)
@@ -29,8 +31,10 @@
 #test_error_test_SOURCES = test/error_test.cc
 test_graph_test_SOURCES = test/graph_test.cc
 # test_heap_test_SOURCES = test/heap_test.cc
+test_kruskal_test_SOURCES = test/kruskal_test.cc
 test_maps_test_SOURCES = test/maps_test.cc
 test_path_test_SOURCES = test/path_test.cc
 test_random_test_SOURCES = test/random_test.cc
 test_test_tools_fail_SOURCES = test/test_tools_fail.cc
 test_test_tools_pass_SOURCES = test/test_tools_pass.cc
+test_unionfind_test_SOURCES = test/unionfind_test.cc