diff --git a/test/ruby/test_complex2.rb b/test/ruby/test_complex2.rb
index 4e960c3e36..3ee7810dc6 100644
--- a/test/ruby/test_complex2.rb
+++ b/test/ruby/test_complex2.rb
@@ -3,7 +3,7 @@ require 'test/unit'
 class Complex_Test2 < Test::Unit::TestCase
 
   def test_kumi
-    return unless defined?(Rational)
+    skip unless defined?(Rational)
 
     assert_equal(Complex(1, 0), +Complex(1, 0))
     assert_equal(Complex(-1, 0), -Complex(1, 0))
diff --git a/test/ruby/test_complexrational.rb b/test/ruby/test_complexrational.rb
index 47c535fca0..99f54e4e97 100644
--- a/test/ruby/test_complexrational.rb
+++ b/test/ruby/test_complexrational.rb
@@ -3,7 +3,7 @@ require 'test/unit'
 class ComplexRational_Test < Test::Unit::TestCase
 
   def test_rat_srat
-    return unless defined?(Rational)
+    skip unless defined?(Rational)
 
     c = SimpleRat(1,3)
     cc = Rational(3,2)
@@ -88,7 +88,7 @@ class ComplexRational_Test < Test::Unit::TestCase
   end
 
   def test_comp_srat
-    return unless defined?(Rational)
+    skip unless defined?(Rational)
 
     c = Complex(SimpleRat(2,3),SimpleRat(1,2))
     cc = Complex(Rational(3,2),Rational(2,1))