diff --git a/lib/jasmine-core/jasmine.js b/lib/jasmine-core/jasmine.js
index a077925a..f74f8ed7 100644
--- a/lib/jasmine-core/jasmine.js
+++ b/lib/jasmine-core/jasmine.js
@@ -1042,7 +1042,7 @@ getJasmineRequireObj().Spec = function(j$) {
       boilerplateEnd =
         boilerplateStart + Spec.pendingSpecExceptionMessage.length;
 
-    return fullMessage.substr(boilerplateEnd);
+    return fullMessage.slice(boilerplateEnd);
   };
 
   Spec.pendingSpecExceptionMessage = '=> marked Pending';
diff --git a/spec/core/asymmetric_equality/ArrayContainingSpec.js b/spec/core/asymmetric_equality/ArrayContainingSpec.js
index 71d44df3..8024b5bd 100644
--- a/spec/core/asymmetric_equality/ArrayContainingSpec.js
+++ b/spec/core/asymmetric_equality/ArrayContainingSpec.js
@@ -58,8 +58,8 @@ describe('ArrayContaining', function() {
       if (
         typeof a == 'string' &&
         typeof b == 'string' &&
-        a.substr(0, 3) == 'foo' &&
-        b.substr(0, 3) == 'foo'
+        a.slice(0, 3) == 'foo' &&
+        b.slice(0, 3) == 'foo'
       ) {
         return true;
       }
diff --git a/spec/core/asymmetric_equality/ArrayWithExactContentsSpec.js b/spec/core/asymmetric_equality/ArrayWithExactContentsSpec.js
index c25470ae..c6e111a0 100644
--- a/spec/core/asymmetric_equality/ArrayWithExactContentsSpec.js
+++ b/spec/core/asymmetric_equality/ArrayWithExactContentsSpec.js
@@ -48,8 +48,8 @@ describe('ArrayWithExactContents', function() {
       if (
         typeof a == 'string' &&
         typeof b == 'string' &&
-        a.substr(0, 3) == 'foo' &&
-        b.substr(0, 3) == 'foo'
+        a.slice(0, 3) == 'foo' &&
+        b.slice(0, 3) == 'foo'
       ) {
         return true;
       }
diff --git a/spec/core/asymmetric_equality/ObjectContainingSpec.js b/spec/core/asymmetric_equality/ObjectContainingSpec.js
index 07772047..9b567892 100644
--- a/spec/core/asymmetric_equality/ObjectContainingSpec.js
+++ b/spec/core/asymmetric_equality/ObjectContainingSpec.js
@@ -121,8 +121,8 @@ describe('ObjectContaining', function() {
       if (
         typeof a == 'string' &&
         typeof b == 'string' &&
-        a.substr(0, 3) == 'foo' &&
-        b.substr(0, 3) == 'foo'
+        a.slice(0, 3) == 'foo' &&
+        b.slice(0, 3) == 'foo'
       ) {
         return true;
       }
diff --git a/spec/core/integration/CustomMatchersSpec.js b/spec/core/integration/CustomMatchersSpec.js
index 5bd990f8..643451ef 100644
--- a/spec/core/integration/CustomMatchersSpec.js
+++ b/spec/core/integration/CustomMatchersSpec.js
@@ -81,8 +81,8 @@ describe('Custom Matchers (Integration)', function() {
         if (
           typeof a == 'string' &&
           typeof b == 'string' &&
-          a.substr(0, 3) == 'foo' &&
-          b.substr(0, 3) == 'foo'
+          a.slice(0, 3) == 'foo' &&
+          b.slice(0, 3) == 'foo'
         ) {
           return true;
         }
diff --git a/src/core/Spec.js b/src/core/Spec.js
index f9a774a8..f4bc6b54 100644
--- a/src/core/Spec.js
+++ b/src/core/Spec.js
@@ -316,7 +316,7 @@ getJasmineRequireObj().Spec = function(j$) {
       boilerplateEnd =
         boilerplateStart + Spec.pendingSpecExceptionMessage.length;
 
-    return fullMessage.substr(boilerplateEnd);
+    return fullMessage.slice(boilerplateEnd);
   };
 
   Spec.pendingSpecExceptionMessage = '=> marked Pending';