diff --git a/exercises/practice/gigasecond/test/gigasecond_test.clj b/exercises/practice/gigasecond/test/gigasecond_test.clj
index 6cdf3f06..492f0b7c 100644
--- a/exercises/practice/gigasecond/test/gigasecond_test.clj
+++ b/exercises/practice/gigasecond/test/gigasecond_test.clj
@@ -1,16 +1,21 @@
 (ns gigasecond-test
-  (:require [clojure.test :refer [deftest is]]
+  (:require [clojure.test :refer [deftest testing is]]
             gigasecond))
 
-(deftest from-apr-25-2011
-  (is (= [2043 1 1] (gigasecond/from 2011 4 25))))
+(deftest test-92fbe71c-ea52-4fac-bd77-be38023cacf7
+  (testing "Date-only specification of time"
+    (is (= [2043 1 1] (gigasecond/from 2011 4 25)))))
 
-(deftest from-jun-13-1977
-  (is (= [2009 2 19] (gigasecond/from 1977 6 13))))
+(deftest test-6d86dd16-6f7a-47be-9e58-bb9fb2ae1433
+  (testing "Second test for date-only specification of time"
+    (is (= [2009 2 19] (gigasecond/from 1977 6 13)))))
 
-(deftest from-jul-19-1959
-  (is (= [1991 3 27] (gigasecond/from 1959 7 19))))
+(deftest test-77eb8502-2bca-4d92-89d9-7b39ace28dd5
+  (testing "Third test for date-only specification of time"
+    (is (= [1991 3 27] (gigasecond/from 1959 7 19)))))
 
-;; customize this to test your birthday and find your gigasecond date:
-;; (deftest your-birthday
-;;   (is (= [year2 month2 day2] (gigasecond/from year1 month1 day1))))
+(deftest test-fcec307c-7529-49ab-b0fe-20309197618a
+  (testing "Does not mutate the input"
+    (let [date [1959 7 19]
+          new-date (apply gigasecond/from date)]
+      (is (= [1959 7 19] date)))))