diff --git a/lib/internal/blob.js b/lib/internal/blob.js
index 68071a5f5645e7..41c7f61da7902d 100644
--- a/lib/internal/blob.js
+++ b/lib/internal/blob.js
@@ -261,11 +261,11 @@ class Blob {
 
     start = converters['long long'](
       start,
-      { __proto__: null, context: 'start' },
+      { __proto__: null, context: 'start', clamp: true },
     );
     end = converters['long long'](
       end,
-      { __proto__: null, context: 'end' },
+      { __proto__: null, context: 'end', clamp: true },
     );
 
     if (start < 0) {
diff --git a/test/wpt/status/FileAPI/blob.cjs b/test/wpt/status/FileAPI/blob.cjs
index 99ec7dd22cea5f..bf40df1b842588 100644
--- a/test/wpt/status/FileAPI/blob.cjs
+++ b/test/wpt/status/FileAPI/blob.cjs
@@ -36,16 +36,4 @@ module.exports = {
   'Blob-in-worker.worker.js': {
     skip: 'Depends on Web Workers API',
   },
-  'Blob-slice.any.js': {
-    fail: {
-      expected: [
-        'Slicing test: slice (1,1).',
-        'Slicing test: slice (1,3).',
-        'Slicing test: slice (1,5).',
-        'Slicing test: slice (1,7).',
-        'Slicing test: slice (1,8).',
-        'Slicing test: slice (1,9).',
-      ],
-    },
-  },
 };