refactor: just point to jq doc
diff --git a/docs/testing.md b/docs/testing.md
index 1ad3f26..ff4ff04 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -40,13 +40,8 @@
 Uses jq to filter each file. The default value of `"."` as the filter
 means to compare the whole file.
 
-WORKSPACE users must register the jq toolchain in their to use this rule:
-
-```starlark
-load("@aspect_bazel_lib//lib:repositories.bzl", "register_jq_toolchains")
-
-register_jq_toolchains()
-```
+See the [jq rule](./jq.md#jq) for more about the filter expressions as well as
+setup notes for the `jq` toolchain.
 
 
 **PARAMETERS**
diff --git a/lib/testing.bzl b/lib/testing.bzl
index 948bcc2..7acf67b 100644
--- a/lib/testing.bzl
+++ b/lib/testing.bzl
@@ -78,13 +78,8 @@
     Uses jq to filter each file. The default value of `"."` as the filter
     means to compare the whole file.
 
-    WORKSPACE users must register the jq toolchain in their to use this rule:
-
-    ```starlark
-    load("@aspect_bazel_lib//lib:repositories.bzl", "register_jq_toolchains")
-
-    register_jq_toolchains()
-    ```
+    See the [jq rule](./jq.md#jq) for more about the filter expressions as well as
+    setup notes for the `jq` toolchain.
 
     Args:
         name: name of resulting diff_test target