diff --git a/lib/internal/debugger/inspect_client.js b/lib/internal/debugger/inspect_client.js
index 5bd73d250c2ead..f170b91427797f 100644
--- a/lib/internal/debugger/inspect_client.js
+++ b/lib/internal/debugger/inspect_client.js
@@ -193,7 +193,17 @@ class Client extends EventEmitter {
       if (payloadBuffer === null || payloadBuffer.length === 0) break;
 
       const payloadStr = payloadBuffer.toString();
-      debuglog('< %s', payloadStr);
+      if (payloadStr.startsWith('{"method":"Debugger.scriptParsed"')) {
+        // Do not log Debugger.scriptParsed events because the payloads
+        // can be huge.
+        debuglog('< Debugger.scriptParsed ...');
+      } else if (payloadStr.startsWith('{"method":"Debugger.paused"')) {
+        // Do not log Debugger.paused events because the payloads
+        // can be huge.
+        debuglog('< Debugger.paused ...');
+      } else {
+        debuglog('< %s', payloadStr);
+      }
       const lastChar = payloadStr[payloadStr.length - 1];
       if (payloadStr[0] !== '{' || lastChar !== '}') {
         throw new ERR_DEBUGGER_ERROR(`Payload does not look like JSON: ${payloadStr}`);
diff --git a/test/common/debugger.js b/test/common/debugger.js
index d2ac4f3b6c5fbf..0a7c1e87a73124 100644
--- a/test/common/debugger.js
+++ b/test/common/debugger.js
@@ -7,7 +7,10 @@ const BREAK_MESSAGE = new RegExp('(?:' + [
   'exception', 'other', 'promiseRejection',
 ].join('|') + ') in', 'i');
 
-const TIMEOUT = common.platformTimeout(5000);
+let TIMEOUT = common.platformTimeout(5000);
+if (common.isWindows) {
+  TIMEOUT = common.platformTimeout(15000);
+}
 
 function isPreBreak(output) {
   return /Break on start/.test(output) && /1 \(function \(exports/.test(output);
diff --git a/test/sequential/test-debugger-breakpoint-exists.js b/test/sequential/test-debugger-breakpoint-exists.js
index 7be0ba657fa981..47fc3c3ceec43a 100644
--- a/test/sequential/test-debugger-breakpoint-exists.js
+++ b/test/sequential/test-debugger-breakpoint-exists.js
@@ -7,6 +7,7 @@ common.skipIfInspectorDisabled();
 const fixtures = require('../common/fixtures');
 const startCLI = require('../common/debugger');
 
+process.env.NODE_DEBUG = 'inspect';
 // Test for "Breakpoint at specified location already exists" error.
 {
   const script = fixtures.path('debugger', 'three-lines.js');
diff --git a/test/sequential/test-debugger-help.js b/test/sequential/test-debugger-help.js
index e24f873212b589..a1948d5ba887da 100644
--- a/test/sequential/test-debugger-help.js
+++ b/test/sequential/test-debugger-help.js
@@ -7,6 +7,7 @@ const fixtures = require('../common/fixtures');
 const startCLI = require('../common/debugger');
 
 const assert = require('assert');
+process.env.NODE_DEBUG = 'inspect';
 
 {
   const cli = startCLI([fixtures.path('debugger/empty.js')]);
diff --git a/test/sequential/test-debugger-list.js b/test/sequential/test-debugger-list.js
index 594874e140b306..f95beb4f32df48 100644
--- a/test/sequential/test-debugger-list.js
+++ b/test/sequential/test-debugger-list.js
@@ -8,6 +8,7 @@ const startCLI = require('../common/debugger');
 
 const assert = require('assert');
 
+process.env.NODE_DEBUG = 'inspect';
 const cli = startCLI([fixtures.path('debugger/three-lines.js')]);
 
 (async () => {
diff --git a/test/sequential/test-debugger-low-level.js b/test/sequential/test-debugger-low-level.js
index f6d97f2dfe153d..5558dccd5313b9 100644
--- a/test/sequential/test-debugger-low-level.js
+++ b/test/sequential/test-debugger-low-level.js
@@ -6,6 +6,7 @@ common.skipIfInspectorDisabled();
 const fixtures = require('../common/fixtures');
 const startCLI = require('../common/debugger');
 const assert = require('assert');
+process.env.NODE_DEBUG = 'inspect';
 
 // Debugger agent direct access.
 {
diff --git a/test/sequential/test-debugger-random-port.js b/test/sequential/test-debugger-random-port.js
index da8656cf1c7115..189d5052eb97bd 100644
--- a/test/sequential/test-debugger-random-port.js
+++ b/test/sequential/test-debugger-random-port.js
@@ -8,6 +8,7 @@ const startCLI = require('../common/debugger');
 
 const assert = require('assert');
 
+process.env.NODE_DEBUG = 'inspect';
 // Random port.
 {
   const script = fixtures.path('debugger', 'three-lines.js');