diff --git a/src/lib/isPostalCode.js b/src/lib/isPostalCode.js
index cf5b50d25..1c45ca1c1 100644
--- a/src/lib/isPostalCode.js
+++ b/src/lib/isPostalCode.js
@@ -37,7 +37,7 @@ const patterns = {
   IE: /^(?!.*(?:o))[A-Za-z]\d[\dw]\s\w{4}$/i,
   IL: /^(\d{5}|\d{7})$/,
   IN: /^((?!10|29|35|54|55|65|66|86|87|88|89)[1-9][0-9]{5})$/,
-  IR: /\b(?!(\d)\1{3})[13-9]{4}[1346-9][013-9]{5}\b/,
+  IR: /^(?!(\d)\1{3})[13-9]{4}[1346-9][013-9]{5}$/,
   IS: threeDigit,
   IT: fiveDigit,
   JP: /^\d{3}\-\d{4}$/,
diff --git a/test/validators.js b/test/validators.js
index c0e36bec7..0591250fb 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -11447,6 +11447,9 @@ describe('Validators', () => {
           '43516 6456',
           '123443516 6456',
           '891123',
+          'test 4351666456',
+          '4351666456 test',
+          'test 4351666456 test',
         ],
       },
       {