diff --git a/tests/unit/test_algorithms.cpp b/tests/unit/test_algorithms.cpp
index ebe19c3752e9e4eacb23008e467bca9a1fd95f79..2e82bcc9a6effc4e0fdbb70bbad3d7cddf443aba 100644
--- a/tests/unit/test_algorithms.cpp
+++ b/tests/unit/test_algorithms.cpp
@@ -244,9 +244,9 @@ TEST(algorithms, has_contiguous_compartments)
 
     //
     //     0
-    //    / \
+    //    / \.
     //   1   2
-    //  / \
+    //  / \.
     // 3   4
     //
     EXPECT_TRUE(