diff --git a/test/units/sass_extensions_test.rb b/test/units/sass_extensions_test.rb
index 1aef7634..45714514 100644
--- a/test/units/sass_extensions_test.rb
+++ b/test/units/sass_extensions_test.rb
@@ -68,10 +68,10 @@ class SassExtensionsTest < Test::Unit::TestCase
     assert_equal "0.841px", evaluate("sin(1px)")
     assert_equal "0.0", evaluate("sin(pi())")
     assert_equal "1",   evaluate("sin(pi() / 2)")
-    assert_equal "1",   evaluate("sin(180deg)")
+    assert_equal "0.0",   evaluate("sin(180deg)")
     assert_equal "-1",  evaluate("sin(3* pi() / 2)")
     assert_equal "-1", evaluate("cos(pi())")
-    assert_equal "-1", evaluate("cos(360deg)")
+    assert_equal "1", evaluate("cos(360deg)")
     assert_equal "1", evaluate("cos(2*pi())")
     assert_equal "0.0",   evaluate("cos(pi() / 2)")
     assert_equal "0.0",  evaluate("cos(3* pi() / 2)")
@@ -79,12 +79,12 @@ class SassExtensionsTest < Test::Unit::TestCase
     assert_equal "0.0", evaluate("tan(360deg)")
     assert evaluate("tan(pi()/2 - 0.0001)").to_f > 1000, evaluate("tan(pi()/2 - 0.0001)")
     assert evaluate("tan(pi()/2 + 0.0001)").to_f < -1000, evaluate("tan(pi()/2 - 0.0001)")
-    assert_equal "0.893px", evaluate("log(1)")
-    assert_equal "0.0", evaluate("log(1)")
-    assert_equal "1.0", evaluate("log(e())")
+    assert_equal "0.693px", evaluate("log(2px)")
+    assert_equal "0", evaluate("log(1)")
+    assert_equal "1", evaluate("log(e())")
     assert_equal "5px", evaluate("sqrt(25px)")
     assert_equal "25px", evaluate("pow(5px, 2)")
-    assert_equal "148.413px", evaluate("pow(5px, e())")
+    assert_equal "79.432px", evaluate("pow(5px, e())")
   end
 
   def test_blank