diff --git a/cl-num-utils.asd b/cl-num-utils.asd
index 94bd596..c6e46fb 100644
--- a/cl-num-utils.asd
+++ b/cl-num-utils.asd
@@ -52,4 +52,5 @@
    (:file "matrix")
    (:file "matrix-shorthand")
    (:file "num=")
-   (:file "statistics")))
+   (:file "statistics")
+   (:file "utilities")))
diff --git a/tests/utilities.lisp b/tests/utilities.lisp
new file mode 100644
index 0000000..ab10042
--- /dev/null
+++ b/tests/utilities.lisp
@@ -0,0 +1,25 @@
+;;; -*- Mode:Lisp; Syntax:ANSI-Common-Lisp; Coding:utf-8 -*-
+
+(in-package #:cl-num-utils-tests)
+
+(defsuite utilities-tests (tests))
+
+(deftest gethash-test (utilities-tests)
+  (let ((table (make-hash-table :test #'eq)))
+    (setf (gethash 'a table) 1)
+    (assert-eql 1 (gethash* 'a table))
+    (assert-condition error (gethash* 'b table))))
+
+(deftest biconditional-test (utilities-tests)
+  (assert-true (bic t t))
+  (assert-true (bic nil nil))
+  (assert-false (bic t nil))
+  (assert-false (bic nil t)))
+
+(deftest splice-when (utilities-tests)
+  (assert-equal '(a b c) `(a ,@(splice-when t 'b) c))
+  (assert-equal '(a c) `(a ,@(splice-when nil 'b) c))
+  (assert-equal '(a b c) `(a ,@(splice-awhen 'b it) c))
+  (assert-equal '(a c) `(a ,@(splice-awhen (not 'b) it) c)))
+
+;;; FIXME: write tests for other utilities