1 files changed, 4 insertions, 15 deletions
diff --git a/spec/ruby/core/exception/system_call_error_spec.rb b/spec/ruby/core/exception/system_call_error_spec.rb
index f6995d3c5e..ea54e1ad4c 100644
--- a/spec/ruby/core/exception/system_call_error_spec.rb
+++ b/spec/ruby/core/exception/system_call_error_spec.rb
@@ -25,6 +25,7 @@ describe "SystemCallError.new" do
     @example_errno_class = Errno::EINVAL
     @last_known_errno = Errno.constants.size - 1
     @unknown_errno = Errno.constants.size
+    @some_human_readable = "[[:graph:]]+"
   end
 
   it "requires at least one argument" do
@@ -96,23 +97,11 @@ describe "SystemCallError.new" do
   end
 
   it "sets an 'unknown error' message when an unknown error number" do
-    platform_is_not :windows do
-      SystemCallError.new(-1).message.should =~ /Unknown error(:)? -1/
-    end
-
-    platform_is :windows do
-      SystemCallError.new(-1).message.should == "The operation completed successfully."
-    end
+    SystemCallError.new(-1).message.should =~ Regexp.new(@some_human_readable)
   end
 
   it "adds a custom error message to an 'unknown error' message when an unknown error number and a custom message specified" do
-    platform_is_not :windows do
-      SystemCallError.new("custom message", -1).message.should =~ /Unknown error(:)? -1 - custom message/
-    end
-
-    platform_is :windows do
-      SystemCallError.new("custom message", -1).message.should == "The operation completed successfully. - custom message"
-    end
+    SystemCallError.new("custom message", -1).message.should =~ Regexp.new("#{@some_human_readable}.* - custom message")
   end
 
   it "converts to Integer if errno is a Complex convertible to Integer" do
@@ -153,7 +142,7 @@ describe "SystemCallError#message" do
       SystemCallError.new(2**28).message.should =~ /Error .*occurred/i
     end
     platform_is_not :aix do
-      SystemCallError.new(2**28).message.should =~ /Unknown error/i
+      SystemCallError.new(2**28).message.should =~ Regexp.new(@some_human_readable)
     end
   end