autoloading test classes in clojure ?

I have a test suite in Clojure using core.test that I run by starting by server, starting emacs, connecting to my REPL using Cider, and evaluating

(run-tests 'im.user-test
           'im.organization-test
           'im.group-test
           'im.content-test
           'im.orders-test
           'im.db-test
           'im.collection-test)

The problem is to run the above, I need to first open up each one of those files and evaluate them in the REPL before the above will work because the repl doesn't know about these classes. If I try to require the test without going to the file and evaluating it, I get the error "Could not locate im/orders_test__init.class or im/orders_test.clj on classpath. Please check that namespaces with dashes use underscores in the Clojure file name."

Each of my test files is in /test and for example my main test file looks like.

(ns im.core-test
  (:import datomic.Util)
  (:require
   [im.db :as db]
   [im.models.user :as user]
   [clojure.java.io :as io]
   [clojure.test :refer :all]
   [clj-http.client :as client]
   [datomic.api :as d]
   [environ.core :refer [env]]))

   (defn reload-db [test-fn]
     (with-redefs [db/uri db/testuri]
       (db/reload-db)
       (with-redefs [db/conn (d/connect db/testuri)]
         (test-fn))))

 (comment
    (run-tests 'im.user-test
               'im.organization-test
               'im.group-test
               'im.content-test
               'im.orders-test
               'im.db-test
               'im.collection-test))

and for example a test file would look like this

;; app_root/test/orders_test.clj
(ns im.orders-test
  (:require
   [im.models.order :as o]
   [im.db :as db]
   [clojure.test :refer :all]))

So, is there a way to automatically load all the test classes, or am I going about this entirely wrong in general?