diff --git a/lib/auth/sso.js b/lib/auth/sso.js
index 795eb8972a223..9812a18cb99ca 100644
--- a/lib/auth/sso.js
+++ b/lib/auth/sso.js
@@ -36,8 +36,6 @@ function sleep (time) {
 }
 
 const login = async (npm, { creds, registry, scope }) => {
-  log.warn('deprecated', 'SSO --auth-type is deprecated')
-
   const opts = { ...npm.flatOptions, creds, registry, scope }
   const { ssoType } = opts
 
diff --git a/lib/commands/install.js b/lib/commands/install.js
index ebba02a1bd47d..0a5c827bcc97b 100644
--- a/lib/commands/install.js
+++ b/lib/commands/install.js
@@ -109,7 +109,6 @@ class Install extends ArboristWorkspaceCmd {
     const isGlobalInstall = this.npm.config.get('global')
     const where = isGlobalInstall ? globalTop : this.npm.prefix
     const forced = this.npm.config.get('force')
-    const isDev = this.npm.config.get('dev')
     const scriptShell = this.npm.config.get('script-shell') || undefined
 
     // be very strict about engines when trying to update npm itself
@@ -140,14 +139,6 @@ class Install extends ArboristWorkspaceCmd {
       args = ['.']
     }
 
-    // TODO: Add warnings for other deprecated flags?  or remove this one?
-    if (isDev) {
-      log.warn(
-        'install',
-        'Usage of the `--dev` option is deprecated. Use `--include=dev` instead.'
-      )
-    }
-
     const opts = {
       ...this.npm.flatOptions,
       auditLevel: null,
@@ -163,7 +154,7 @@ class Install extends ArboristWorkspaceCmd {
         'preinstall',
         'install',
         'postinstall',
-        'prepublish', // XXX should we remove this finally??
+        'prepublish', // XXX(npm9) should we remove this finally??
         'preprepare',
         'prepare',
         'postprepare',
diff --git a/test/lib/auth/sso.js b/test/lib/auth/sso.js
index eab51f06c0ab2..8d70077ad205f 100644
--- a/test/lib/auth/sso.js
+++ b/test/lib/auth/sso.js
@@ -1,7 +1,6 @@
 const t = require('tap')
 
 let log = ''
-let warn = ''
 
 const _flatOptions = {
   ssoType: 'oauth',
@@ -15,9 +14,6 @@ const sso = t.mock('../../../lib/auth/sso.js', {
     info: (...msgs) => {
       log += msgs.join(' ') + '\n'
     },
-    warn: (...msgs) => {
-      warn += msgs.join(' ')
-    },
   },
   'npm-profile': profile,
   'npm-registry-fetch': npmFetch,
@@ -44,15 +40,8 @@ t.test('empty login', async (t) => {
     'should throw if no sso-type defined in flatOptions'
   )
 
-  t.equal(
-    warn,
-    'deprecated SSO --auth-type is deprecated',
-    'should print deprecation warning'
-  )
-
   _flatOptions.ssoType = 'oauth'
   log = ''
-  warn = ''
 })
 
 t.test('simple login', async (t) => {
@@ -104,7 +93,6 @@ t.test('simple login', async (t) => {
   )
 
   log = ''
-  warn = ''
   delete profile.loginCouch
   delete npmFetch.json
 })
@@ -151,7 +139,6 @@ t.test('polling retry', async (t) => {
   })
 
   log = ''
-  warn = ''
   delete profile.loginCouch
   delete npmFetch.json
 })
@@ -174,7 +161,6 @@ t.test('polling error', async (t) => {
   )
 
   log = ''
-  warn = ''
   delete profile.loginCouch
   delete npmFetch.json
 })
@@ -193,7 +179,6 @@ t.test('no token retrieved from loginCouch', async (t) => {
   )
 
   log = ''
-  warn = ''
   delete profile.loginCouch
 })
 
@@ -211,7 +196,6 @@ t.test('no sso url retrieved from loginCouch', async (t) => {
   )
 
   log = ''
-  warn = ''
   delete profile.loginCouch
 })
 
@@ -247,7 +231,6 @@ t.test('scoped login', async (t) => {
   )
 
   log = ''
-  warn = ''
   delete profile.loginCouch
   delete npmFetch.json
 })
diff --git a/test/lib/commands/install.js b/test/lib/commands/install.js
index d5db3af673caa..afb6adb4fb0a5 100644
--- a/test/lib/commands/install.js
+++ b/test/lib/commands/install.js
@@ -12,7 +12,7 @@ t.test('with args, dev=true', async t => {
   let REIFY_CALLED = false
   let ARB_OBJ = null
 
-  const { npm, logs } = await loadMockNpm(t, {
+  const { npm } = await loadMockNpm(t, {
     '@npmcli/run-script': ({ event }) => {
       SCRIPTS.push(event)
     },
@@ -41,10 +41,7 @@ t.test('with args, dev=true', async t => {
   npm.prefix = path.resolve(t.testdir({}))
 
   await npm.exec('install', ['fizzbuzz'])
-  t.match(
-    logs.warn,
-    [['install', 'Usage of the `--dev` option is deprecated. Use `--include=dev` instead.']]
-  )
+
   t.match(
     ARB_ARGS,
     { global: false, path: npm.prefix, auditLevel: null },