diff --git a/test/unit/test-hosts.janet b/test/unit/test-hosts.janet
index 0829db3..39434bf 100644
--- a/test/unit/test-hosts.janet
+++ b/test/unit/test-hosts.janet
@@ -4,76 +4,76 @@
   (apply :update ipv4 "127.0.0.1" ["localhost" "localhost.local"])
 
   (assert (deep= (:hosts ipv4 "127.0.0.1") @["localhost" "localhost.local"])
-          "Hosts lookup by IP.")
+          (string/format "Hosts lookup by IP: %q" ipv4))
 
   (assert (= (:ip ipv4 "localhost") "127.0.0.1")
-          "IP lookup by host.")
+          (string/format "IP lookup by host: %q" ipv4))
 
   (assert (= (:hosts ipv4 "0.0.0.0") nil)
-          "Lookup unknown IP.")
+          (string/format "Lookup unknown IP: %q" ipv4))
 
   (assert (= (:ip ipv4 "unknown") nil)
-          "Lookup unknown host.")
+          (string/format "Lookup unknown host: %q" ipv4))
 
   (:update ipv4 "192.168.1.100" "hostname")
 
   (assert (deep= (:hosts ipv4 "192.168.1.100") @["hostname"])
-          "Hosts lookup by IP.")
+          (string/format "Hosts lookup by IP: %q" ipv4))
 
   (assert (= (:ip ipv4 "hostname") "192.168.1.100")
-          "IP lookup by host.")
+          (string/format "IP lookup by host: %q" ipv4))
 
   (assert (deep= (:hosts ipv4 "127.0.0.1") @["localhost" "localhost.local"])
-          "Hosts lookup by IP, after updating unrelated host.")
+          (string/format "Hosts lookup by IP, after unrelated host: %q" ipv4))
 
   (assert (= (:ip ipv4 "localhost") "127.0.0.1")
-          "IP lookup by host, after updating unrelated host.")
+          (string/format "IP lookup by host, after unrelated host: %q" ipv4))
 
   (apply :update ipv4 "127.0.1.1" ["hostname" "localhost.local"])
 
   (assert (deep= (:hosts ipv4 "127.0.1.1")
                  @["hostname" "localhost" "localhost.local"])
-          "Hosts lookup by IP, after updating via alias.")
+          (string/format "Hosts lookup by IP, after alias update: %q" ipv4))
 
   (assert (= (:ip ipv4 "localhost") "127.0.1.1")
-          "IP lookup by host, after updating via alias.")
+          (string/format "IP lookup by host, after alias update: %q" ipv4))
 
   (assert (= (:hosts ipv4 "127.0.0.1") nil)
-          "Hosts lookup by original IP, after updating via alias."))
+          (string/format "Hosts lookup by old IP, after update: %q" ipv4)))
 
 (let [int-tracker (tracker)]
   (assert (= (:seen? int-tracker 7) false)
-          "Checking a not-yet-seen value.")
+          (string/format "Checking a not-yet-seen value: %q" int-tracker))
 
   (:see int-tracker 7)
 
   (assert (= (:seen? int-tracker 7) true)
-          "Checking a seen value.")
+          (string/format "Checking a seen value: %q" int-tracker))
 
   (assert (= (:seen? int-tracker 42) false)
-          "Checking an unrelated value."))
+          (string/format "Checking an unrelated value: %q" int-tracker)))
 
 (let [table-tracker (tracker hash)
       a-table @{7 "seven"}]
   (assert (= (:seen? table-tracker a-table) false)
-          "Checking a not-yet-seen value.")
+          (string/format "Checking a not-yet-seen value: %q" table-tracker))
 
   (:see table-tracker a-table)
 
   (assert (= (:seen? table-tracker a-table) true)
-          "Checking a seen value.")
+          (string/format "Checking a seen value: %q" table-tracker))
 
   (assert (= (:seen? table-tracker @{42 "forty-two" 7 "seven"}) false)
-          "Checking an unrelated value."))
+          (string/format "Checking an unrelated value: %q" table-tracker)))
 
 (let [custom-tracker (tracker (fn [xs] (string/join xs "|")))]
   (assert (= (:seen? custom-tracker @["hello" "world"]) false)
-          "Checking a not-yet-seen value.")
+          (string/format "Checking a not-yet-seen value: %q" custom-tracker))
 
   (:see custom-tracker @["hello" "world"])
 
   (assert (= (:seen? custom-tracker @["hello" "world"]) true)
-          "Checking a seen value.")
+          (string/format "Checking a seen value: %q" custom-tracker))
 
   (assert (= (:seen? custom-tracker @["hello"]) false)
-          "Checking an unrelated value."))
+          (string/format "Checking an unrelated value: %q" custom-tracker)))