diff --git a/CHANGES.md b/CHANGES.md
index 32ea276..2c0006b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,7 +2,6 @@
 
 *BREAKING CHANGES*
 
-* JDK 17 is now required when using Clojure
 * Groups are now defined in the options passed to `net.lewisship.cli-tools/dispatch`, not in
   namespace metadata
 * Command names are matched as prefixes (not substrings)
diff --git a/README.md b/README.md
index 793a006..8aef73b 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,6 @@ Documentation starts with [the overview](doc/overview.md).
 ## Compatibility
 
 `cli-tools` is compatible with Clojure 1.11 and above, and w/ Babashka.  
-For Clojure, it requires JDK 17 or above.
 
 ## License
 
diff --git a/src/net/lewisship/cli_tools.clj b/src/net/lewisship/cli_tools.clj
index edc28dc..6554fc9 100644
--- a/src/net/lewisship/cli_tools.clj
+++ b/src/net/lewisship/cli_tools.clj
@@ -170,16 +170,12 @@
              ;; it can also be a map with key :options
              test-mode?# (impl/command-map? args#)
              command-spec# ~(select-keys parsed-interface parse-cli-keys)]
+         ;; introspection mode is used primarily by completions; it invokes the function with no arguments
+         ;; (but with the flag on) and the command-spec is returned, from which completions are generated.
          (if impl/*introspection-mode*
            command-spec#
-           (let [~command-map-symbol (cond
-                                       test-mode?#
+           (let [~command-map-symbol (if test-mode?#
                                        {:options (first args#)}
-
-                                       impl/*introspection-mode*
-                                       command-spec#
-
-                                       :else
                                        (impl/parse-cli ~command-name'
                                                        ~docstring
                                                        args#
diff --git a/src/net/lewisship/cli_tools/cache.cljc b/src/net/lewisship/cli_tools/cache.cljc
index 8e042c1..fa4195d 100644
--- a/src/net/lewisship/cli_tools/cache.cljc
+++ b/src/net/lewisship/cli_tools/cache.cljc
@@ -9,7 +9,6 @@
             [clj-commons.ansi :refer [perr]]
             #?(:bb [babashka.classpath :as cp]))
   (:import (java.io File)
-           (java.util HexFormat)
            (java.nio ByteBuffer)
            (java.security MessageDigest)))
 
@@ -59,10 +58,10 @@
       ;; Adding or removing a file (even if no other files are touched) will change the digest.
       (update-digest-recursively digest f))))
 
-(defn- hex-string 
-  [^bytes input]
-  (-> (HexFormat/of)
-      (.formatHex input)))
+(defn- hex-string [^bytes input]
+  (let [sb (StringBuilder.)]
+    (run! #(.append sb (format "%X" %)) input)
+    (str sb)))
 
 (defn classpath-digest
   "Passed the tool options, return a hex string of the SHA-1 digest of the files from the classpath and
diff --git a/src/net/lewisship/cli_tools/impl.clj b/src/net/lewisship/cli_tools/impl.clj
index 516a95f..aae4057 100644
--- a/src/net/lewisship/cli_tools/impl.clj
+++ b/src/net/lewisship/cli_tools/impl.clj
@@ -906,11 +906,14 @@
                invoke-last-command-fn nil]
           (cond-let
            (#{"-h" "--help"} term)
-           (if invoke-last-command-fn
-             (invoke-last-command-fn)
-             (do
-               (print-commands nil container-map commands-map false)
-               (exit 0)))
+           (do
+             (print-commands nil container-map commands-map false)
+             ;; This is the ugly mixed case where its a group and a command; we present
+             ;; the group first then the command.
+             (when invoke-last-command-fn
+               (println)
+               (invoke-last-command-fn))
+             (exit 0))
 
            :let [possible-commands commands-map
                  matchable-terms (keys possible-commands)]
diff --git a/test/net/lewisship/cli_tools/messy_test.clj b/test/net/lewisship/cli_tools/messy_test.clj
index 3a6309c..a6d7218 100644
--- a/test/net/lewisship/cli_tools/messy_test.clj
+++ b/test/net/lewisship/cli_tools/messy_test.clj
@@ -39,11 +39,21 @@
               (dispatch "mess" "kiwi"))))
 
 (deftest help-for-messy-command-shows-command-help
-  (let [{:keys [status out]} (dispatch "mess" "-h")]
-    (is (= 0 status))
-    (is (string/includes? out "Usage:"))
-    (is (string/includes? out "NAME"))
-    (is (not (string/includes? out "nested")))))
+  (is (match? {:status    0
+               :out-lines ["bigmess messy - Messy command and group at same time"
+                           ""
+                           "Commands:"
+                           "  nested: Command nested under messy group/command"
+                           ""
+                           "Usage: bigmess messy [OPTIONS] NAME"
+                           "Messy command."
+                           ""
+                           "Options:"
+                           "  -h, --help This command summary"
+                           ""
+                           "Arguments:"
+                           "  NAME: Name to print"]}
+              (dispatch "mess" "-h"))))
 
 (comment