diff --git a/src/auth/auth.spec.ts b/src/auth/auth.spec.ts
index 72ca920..694810e 100644
--- a/src/auth/auth.spec.ts
+++ b/src/auth/auth.spec.ts
@@ -5,7 +5,6 @@ import {
   decodeToken
 } from './auth'
 import { DecodedToken } from '../types'
-import { Logger, LogLevel } from '../logger'
 
 describe('isAccessTokenExpiring', () => {
   it('should return true if the token is expiring in an hour', () => {
@@ -44,53 +43,19 @@ describe('isAccessTokenExpiring', () => {
     ).toBeFalsy()
   })
 
-  it('should route opaque-token debug message through process.logger, not console.debug', () => {
+  it('should return false for an opaque (non-JWT) token without any output', () => {
     const debugSpy = jest.spyOn(console, 'debug').mockImplementation(() => {})
-    const logger = new Logger(LogLevel.Debug)
-    const loggerSpy = jest.spyOn(logger, 'debug').mockImplementation(() => {})
-    const originalLogger = process.logger
-    Object.defineProperty(process, 'logger', {
-      value: logger,
-      configurable: true,
-      writable: true
-    })
+    const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => {})
 
     try {
-      isAccessTokenExpiring('1f8da55057bd4f50a6577f0bc2b38b1a-r')
-      expect(loggerSpy).toHaveBeenCalledWith(
-        'isTokenExpiring: token is not a decodable JWT, treating it as not expiring.'
-      )
-      expect(debugSpy).not.toHaveBeenCalled()
-    } finally {
-      Object.defineProperty(process, 'logger', {
-        value: originalLogger,
-        configurable: true,
-        writable: true
-      })
-      debugSpy.mockRestore()
-      loggerSpy.mockRestore()
-    }
-  })
-
-  it('should not call console.debug for an opaque token when no logger is set', () => {
-    const debugSpy = jest.spyOn(console, 'debug').mockImplementation(() => {})
-    const originalLogger = process.logger
-    Object.defineProperty(process, 'logger', {
-      value: undefined,
-      configurable: true,
-      writable: true
-    })
-
-    try {
-      isAccessTokenExpiring('1f8da55057bd4f50a6577f0bc2b38b1a-r')
+      expect(
+        isAccessTokenExpiring('1f8da55057bd4f50a6577f0bc2b38b1a-r')
+      ).toBeFalsy()
       expect(debugSpy).not.toHaveBeenCalled()
+      expect(errorSpy).not.toHaveBeenCalled()
     } finally {
-      Object.defineProperty(process, 'logger', {
-        value: originalLogger,
-        configurable: true,
-        writable: true
-      })
       debugSpy.mockRestore()
+      errorSpy.mockRestore()
     }
   })
 
diff --git a/src/auth/auth.ts b/src/auth/auth.ts
index 14cceb0..288160e 100644
--- a/src/auth/auth.ts
+++ b/src/auth/auth.ts
@@ -61,12 +61,8 @@ function isTokenExpiring(token: string, timeToLiveSeconds: number) {
     if (!(err instanceof InvalidTokenError)) throw err
     // Opaque tokens cannot be expiry-checked client-side.
     // Assume the token is usable and let the server reject it if expired.
-    // Route through process.logger so the message respects the configured
-    // log level and doesn't pollute stdout in CI/test runs. Falls back to a
-    // no-op when no logger has been installed (e.g. library-only usage).
-    process.logger?.debug?.(
-      'isTokenExpiring: token is not a decodable JWT, treating it as not expiring.'
-    )
+    // Deliberately silent - this is routine (opaque tokens are the norm for
+    // SAS Logon Manager) and must never appear in CLI output.
     return false
   }
 
diff --git a/src/types/system/process.d.ts b/src/types/system/process.d.ts
deleted file mode 100644
index dde24f8..0000000
--- a/src/types/system/process.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-declare namespace NodeJS {
-  export interface Process {
-    logger?: import('../../logger/logger').Logger
-  }
-}
diff --git a/tsconfig.json b/tsconfig.json
index 58d711d..1104fcb 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -14,8 +14,5 @@
     "sourceMap": true
   },
   "exclude": ["node_modules", "**/*.spec.ts"],
-  "include": ["src"],
-  "ts-node": {
-    "files": true
-  }
+  "include": ["src"]
 }