diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-at-max.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-at-max.js
index 820f71ec9e7a01..fcf5279dd3ceae 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-at-max.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-at-max.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -12,7 +10,7 @@ const assert = require('assert');
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-ascii.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-ascii.js
index 7f5a8347956e43..5e3033db3ea193 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-ascii.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-ascii.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -11,7 +9,7 @@ const binding = require(`./build/${common.buildType}/binding`);
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-base64.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-base64.js
index d7fe26814f7b24..400477034d0010 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-base64.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-base64.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -11,7 +9,7 @@ const binding = require(`./build/${common.buildType}/binding`);
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-binary.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-binary.js
index 7e75ba1246662c..ef5d6a21ed0042 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-binary.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-binary.js
@@ -1,8 +1,7 @@
-// Flags: --expose-gc --expose-internals
+// Flags: --expose-gc
 'use strict';
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -12,7 +11,7 @@ const assert = require('assert');
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-hex.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-hex.js
index 57242399bb02b9..844c8bcb335a87 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-hex.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-hex.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -11,7 +9,7 @@ const binding = require(`./build/${common.buildType}/binding`);
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-utf8.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-utf8.js
index 4a0908290c1926..15ec78b6c9ab1c 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-utf8.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-1-utf8.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -12,7 +10,7 @@ const assert = require('assert');
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-2.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-2.js
index 3c613a69fd3fcd..121ca2d62bae6b 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-2.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max-by-2.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -12,7 +10,7 @@ const assert = require('assert');
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max.js b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max.js
index be571c5059ef8f..d65144e04d457c 100644
--- a/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max.js
+++ b/test/addons/stringbytes-external-exceed-max/test-stringbytes-external-exceed-max.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../../common');
-const { internalBinding } = require('internal/test/binding');
 const skipMessage = 'intensive toString tests due to memory confinements';
 if (!common.enoughTestMem)
   common.skip(skipMessage);
@@ -11,7 +9,7 @@ const binding = require(`./build/${common.buildType}/binding`);
 
 // v8 fails silently if string length > v8::String::kMaxLength
 // v8::String::kMaxLength defined in v8.h
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 
 let buf;
 try {
diff --git a/test/sequential/test-fs-readfile-tostring-fail.js b/test/sequential/test-fs-readfile-tostring-fail.js
index da8f3930f618f9..9a443fc71bb2c3 100644
--- a/test/sequential/test-fs-readfile-tostring-fail.js
+++ b/test/sequential/test-fs-readfile-tostring-fail.js
@@ -1,8 +1,6 @@
 'use strict';
-// Flags: --expose-internals
 
 const common = require('../common');
-const { internalBinding } = require('internal/test/binding');
 
 if (!common.enoughTestMem)
   common.skip('intensive toString tests due to memory confinements');
@@ -11,7 +9,7 @@ const assert = require('assert');
 const fs = require('fs');
 const path = require('path');
 const cp = require('child_process');
-const kStringMaxLength = internalBinding('buffer').kStringMaxLength;
+const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
 if (common.isAIX && (Number(cp.execSync('ulimit -f')) * 512) < kStringMaxLength)
   common.skip('intensive toString tests due to file size confinements');