1 files changed, 6 insertions, 6 deletions
diff --git a/spec/ruby/core/math/shared/atanh.rb b/spec/ruby/core/math/shared/atanh.rb
index 3fb64153a0..48a6bf836e 100644
--- a/spec/ruby/core/math/shared/atanh.rb
+++ b/spec/ruby/core/math/shared/atanh.rb
@@ -1,6 +1,6 @@
 describe :math_atanh_base, shared: true do
   it "returns a float" do
-    @object.send(@method, 0.5).should be_an_instance_of(Float)
+    @object.send(@method, 0.5).should.instance_of?(Float)
   end
 
   it "returns the inverse hyperbolic tangent of the argument" do
@@ -11,11 +11,11 @@ describe :math_atanh_base, shared: true do
   end
 
   it "raises a TypeError if the argument is nil" do
-    -> { @object.send(@method, nil) }.should raise_error(TypeError)
+    -> { @object.send(@method, nil) }.should.raise(TypeError)
   end
 
   it "raises a TypeError if the argument is not a Numeric" do
-    -> { @object.send(@method, "test") }.should raise_error(TypeError)
+    -> { @object.send(@method, "test") }.should.raise(TypeError)
   end
 
   it "returns Infinity if x == 1.0" do
@@ -29,16 +29,16 @@ end
 
 describe :math_atanh_private, shared: true do
   it "is a private instance method" do
-    Math.should have_private_instance_method(@method)
+    Math.private_instance_methods(false).should.include?(@method)
   end
 end
 
 describe :math_atanh_no_complex, shared: true do
   it "raises a Math::DomainError for arguments greater than 1.0" do
-    -> { @object.send(@method, 1.0 + Float::EPSILON)  }.should raise_error(Math::DomainError)
+    -> { @object.send(@method, 1.0 + Float::EPSILON)  }.should.raise(Math::DomainError)
   end
 
   it "raises a Math::DomainError for arguments less than -1.0" do
-    -> { @object.send(@method, -1.0 - Float::EPSILON) }.should raise_error(Math::DomainError)
+    -> { @object.send(@method, -1.0 - Float::EPSILON) }.should.raise(Math::DomainError)
   end
 end