3 files changed, 13 insertions, 13 deletions
diff --git a/spec/ruby/core/string/shared/concat.rb b/spec/ruby/core/string/shared/concat.rb
index 7da995fdc7..d7b9cdfec3 100644
--- a/spec/ruby/core/string/shared/concat.rb
+++ b/spec/ruby/core/string/shared/concat.rb
@@ -17,12 +17,12 @@ describe :string_concat, shared: true do
     lambda { 'hello '.send(@method, mock('x')) }.should raise_error(TypeError)
   end
 
-  it "raises a RuntimeError when self is frozen" do
+  it "raises a #{frozen_error_class} when self is frozen" do
     a = "hello"
     a.freeze
 
-    lambda { a.send(@method, "")     }.should raise_error(RuntimeError)
-    lambda { a.send(@method, "test") }.should raise_error(RuntimeError)
+    lambda { a.send(@method, "")     }.should raise_error(frozen_error_class)
+    lambda { a.send(@method, "test") }.should raise_error(frozen_error_class)
   end
 
   it "returns a String when given a subclass instance" do
@@ -87,12 +87,12 @@ describe :string_concat, shared: true do
       lambda { "".send(@method, x) }.should raise_error(TypeError)
     end
 
-    it "raises a RuntimeError when self is frozen" do
+    it "raises a #{frozen_error_class} when self is frozen" do
       a = "hello"
       a.freeze
 
-      lambda { a.send(@method, 0)  }.should raise_error(RuntimeError)
-      lambda { a.send(@method, 33) }.should raise_error(RuntimeError)
+      lambda { a.send(@method, 0)  }.should raise_error(frozen_error_class)
+      lambda { a.send(@method, 33) }.should raise_error(frozen_error_class)
     end
   end
 end
diff --git a/spec/ruby/core/string/shared/replace.rb b/spec/ruby/core/string/shared/replace.rb
index 9f5446fbbe..a583b88b5a 100644
--- a/spec/ruby/core/string/shared/replace.rb
+++ b/spec/ruby/core/string/shared/replace.rb
@@ -62,14 +62,14 @@ describe :string_replace, shared: true do
     lambda { "hello".send(@method, mock('x')) }.should raise_error(TypeError)
   end
 
-  it "raises a RuntimeError on a frozen instance that is modified" do
+  it "raises a #{frozen_error_class} on a frozen instance that is modified" do
     a = "hello".freeze
-    lambda { a.send(@method, "world") }.should raise_error(RuntimeError)
+    lambda { a.send(@method, "world") }.should raise_error(frozen_error_class)
   end
 
   # see [ruby-core:23666]
-  it "raises a RuntimeError on a frozen instance when self-replacing" do
+  it "raises a #{frozen_error_class} on a frozen instance when self-replacing" do
     a = "hello".freeze
-    lambda { a.send(@method, a) }.should raise_error(RuntimeError)
+    lambda { a.send(@method, a) }.should raise_error(frozen_error_class)
   end
 end
diff --git a/spec/ruby/core/string/shared/succ.rb b/spec/ruby/core/string/shared/succ.rb
index 4854cb7146..0ab659864d 100644
--- a/spec/ruby/core/string/shared/succ.rb
+++ b/spec/ruby/core/string/shared/succ.rb
@@ -81,8 +81,8 @@ describe :string_succ_bang, shared: true do
     end
   end
 
-  it "raises a RuntimeError if self is frozen" do
-    lambda { "".freeze.send(@method)     }.should raise_error(RuntimeError)
-    lambda { "abcd".freeze.send(@method) }.should raise_error(RuntimeError)
+  it "raises a #{frozen_error_class} if self is frozen" do
+    lambda { "".freeze.send(@method)     }.should raise_error(frozen_error_class)
+    lambda { "abcd".freeze.send(@method) }.should raise_error(frozen_error_class)
   end
 end