diff --git a/src/mw_engine/utils.clj b/src/mw_engine/utils.clj
index c8ced6a..3ad2b1f 100644
--- a/src/mw_engine/utils.clj
+++ b/src/mw_engine/utils.clj
@@ -1,4 +1,5 @@
-;; Utility functions needed by MicroWorld and, specifically, in the interpretation of MicroWorld rule.
+;; Utility functions needed by MicroWorld and, specifically, in the 
+;; interpretation of MicroWorld rule.
 
 (ns mw-engine.utils
   (:require
diff --git a/test/mw_engine/drainage_test.clj b/test/mw_engine/drainage_test.clj
index 574e7bf..ba2c95a 100644
--- a/test/mw_engine/drainage_test.clj
+++ b/test/mw_engine/drainage_test.clj
@@ -11,7 +11,7 @@
                      (world/make-world 3 3)
                      #(merge %2 {:altitude 100}))
                    1 1 :altitude 90)]
-             (is (is-hollow (utils/get-cell world 1 1) world)
+             (is (is-hollow world (utils/get-cell world 1 1))
                  "Cell at 1, 1 should be a hollow"))))
 
 (deftest flood-hollow-test