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diff --git a/tests/data/heap.scm b/tests/data/heap.scm
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+;;; Chickadee Game Toolkit
+;;; Copyright © 2021 David Thompson <davet@gnu.org>
+;;;
+;;; Chickadee is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published
+;;; by the Free Software Foundation, either version 3 of the License,
+;;; or (at your option) any later version.
+;;;
+;;; Chickadee is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(define-module (tests data heap)
+  #:use-module (tests utils)
+  #:use-module (srfi srfi-64)
+  #:use-module (chickadee data heap))
+
+(with-tests "heap"
+  (let ((h (make-heap)))
+    (heap-insert! h 3)
+    (heap-insert! h 1)
+    (heap-insert! h 2)
+    (test-equal "heap-insert!" (heap-size h) 3)
+    (test-equal "heap-min!" (heap-min h) 1)
+    (heap-remove! h)
+    (test-equal "heap-remove!" (heap-min h) 2)
+    (heap-clear! h)
+    (test-assert "heap-clear!" (heap-empty? h))))