diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
index f59df04672b703..c4fbacc0e0ae46 100644
--- a/doc/api/deprecations.md
+++ b/doc/api/deprecations.md
@@ -160,6 +160,9 @@ outside `node_modules` in order to better target developers, rather than users.
 ### DEP0006: child\_process options.customFds
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/25279
+    description: End-of-Life.
   - version:
     - v4.8.6
     - v6.12.0
@@ -171,7 +174,7 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Runtime
+Type: End-of-Life
 
 Within the [`child_process`][] module's `spawn()`, `fork()`, and `exec()`
 methods, the `options.customFds` option is deprecated. The `options.stdio`
diff --git a/lib/child_process.js b/lib/child_process.js
index 1a5411c8164c10..d70803866c1f58 100644
--- a/lib/child_process.js
+++ b/lib/child_process.js
@@ -22,9 +22,7 @@
 'use strict';
 
 const util = require('util');
-const {
-  deprecate, convertToValidSignal, getSystemErrorName
-} = require('internal/util');
+const { convertToValidSignal, getSystemErrorName } = require('internal/util');
 const { isArrayBufferView } = require('internal/util/types');
 const debug = util.debuglog('child_process');
 const { Buffer } = require('buffer');
@@ -384,20 +382,6 @@ Object.defineProperty(exports.execFile, util.promisify.custom, {
   value: customPromiseExecFunction(exports.execFile)
 });
 
-const _deprecatedCustomFds = deprecate(
-  function deprecateCustomFds(options) {
-    options.stdio = options.customFds.map(function mapCustomFds(fd) {
-      return fd === -1 ? 'pipe' : fd;
-    });
-  }, 'child_process: options.customFds option is deprecated. ' +
-     'Use options.stdio instead.', 'DEP0006');
-
-function _convertCustomFds(options) {
-  if (options.customFds && !options.stdio) {
-    _deprecatedCustomFds(options);
-  }
-}
-
 function normalizeSpawnArguments(file, args, options) {
   validateString(file, 'file');
 
@@ -526,8 +510,6 @@ function normalizeSpawnArguments(file, args, options) {
     }
   }
 
-  _convertCustomFds(options);
-
   return {
     file: file,
     args: args,
diff --git a/test/parallel/test-child-process-custom-fds.js b/test/parallel/test-child-process-custom-fds.js
deleted file mode 100644
index 1c89c207d37f99..00000000000000
--- a/test/parallel/test-child-process-custom-fds.js
+++ /dev/null
@@ -1,47 +0,0 @@
-// Flags: --expose_internals
-'use strict';
-const common = require('../common');
-const assert = require('assert');
-const { spawnSync } = require('child_process');
-const internalCp = require('internal/child_process');
-
-if (!common.isMainThread)
-  common.skip('stdio is not associated with file descriptors in Workers');
-
-// This test uses the deprecated `customFds` option. We expect a deprecation
-// warning, but only once (per node process).
-const msg = 'child_process: options.customFds option is deprecated. ' +
-            'Use options.stdio instead.';
-common.expectWarning('DeprecationWarning', msg, 'DEP0006');
-
-// Verify that customFds is used if stdio is not provided.
-{
-  const customFds = [-1, process.stdout.fd, process.stderr.fd];
-  const oldSpawnSync = internalCp.spawnSync;
-  internalCp.spawnSync = common.mustCall(function(opts) {
-    assert.deepStrictEqual(opts.options.customFds, customFds);
-    assert.deepStrictEqual(opts.options.stdio, [
-      { type: 'pipe', readable: true, writable: false },
-      { type: 'fd', fd: process.stdout.fd },
-      { type: 'fd', fd: process.stderr.fd }
-    ]);
-  });
-  spawnSync(...common.pwdCommand, { customFds });
-  internalCp.spawnSync = oldSpawnSync;
-}
-
-// Verify that customFds is ignored when stdio is present.
-{
-  const customFds = [0, 1, 2];
-  const oldSpawnSync = internalCp.spawnSync;
-  internalCp.spawnSync = common.mustCall(function(opts) {
-    assert.deepStrictEqual(opts.options.customFds, customFds);
-    assert.deepStrictEqual(opts.options.stdio, [
-      { type: 'pipe', readable: true, writable: false },
-      { type: 'pipe', readable: false, writable: true },
-      { type: 'pipe', readable: false, writable: true }
-    ]);
-  });
-  spawnSync(...common.pwdCommand, { customFds, stdio: 'pipe' });
-  internalCp.spawnSync = oldSpawnSync;
-}