diff --git a/types/esprima/esprima-tests.ts b/types/esprima/esprima-tests.ts
index 2032702979..08a3214a95 100644
--- a/types/esprima/esprima-tests.ts
+++ b/types/esprima/esprima-tests.ts
@@ -29,6 +29,7 @@ program = esprima.parseScript('answer = 42 // TODO: why', { comment: true, range
 // Tokenizing
 token = esprima.tokenize('code')[0];
 token = esprima.tokenize('code', {range: true})[0];
+token = esprima.tokenize('/E\/\w*/.exec("e")', { tolerant: true })[0];
 
 // Syntax Delegate
 esprima.parseScript('answer = 42', {}, (node) => {
diff --git a/types/esprima/index.d.ts b/types/esprima/index.d.ts
index 7817465742..cc612b12d1 100644
--- a/types/esprima/index.d.ts
+++ b/types/esprima/index.d.ts
@@ -30,6 +30,7 @@ export interface ParseOptions {
 }
 
 export interface TokenizeOptions {
+    tolerant?: boolean;
     range?: boolean;
     loc?: boolean;
     comment?: boolean;