diff --git a/test/region.cpp b/test/region.cpp
index fe45cc97..aaf7456f 100644
--- a/test/region.cpp
+++ b/test/region.cpp
@@ -1,7 +1,9 @@
 #include "../region.hpp"
+#include "../point.hpp"
 #include "../debug.hpp"
 
 using util::region;
+using util::point2;
 
 int
 main (int, char **) {
@@ -12,5 +14,16 @@ main (int, char **) {
          CHECK_HARD (!a.overlaps (b));
     }
 
+    CHECK_HARD (region<int> (0, 0, 2, 2).includes (point2(1.0, 1.0)));
+    CHECK_HARD (region<int> (0, 0, 2, 2).includes (point2(0.0, 0.0)));
+    CHECK_HARD (region<int> (0, 0, 2, 2).includes (point2(2.0, 2.0)));
+
+    CHECK_HARD ( region<int> (0, 0, 2, 2).contains (point2(1.0, 1.0)));
+    CHECK_HARD (!region<int> (0, 0, 2, 2).contains (point2(0.0, 0.0)));
+    CHECK_HARD (!region<int> (0, 0, 2, 2).contains (point2(2.0, 2.0)));
+
+    CHECK_HARD (region<intmax_t> (0, 0, 10, 10).includes (point2 (0.4, 0.01)));
+    CHECK_HARD (region<intmax_t> (0, 0, 10, 10).contains (point2 (0.4, 0.01)));
+
     return 0;
 }