diff --git a/test/test_jsinterp.py b/test/test_jsinterp.py
index c4bc0e43b..734b5507a 100644
--- a/test/test_jsinterp.py
+++ b/test/test_jsinterp.py
@@ -45,6 +45,8 @@ class TestJSInterpreter(unittest.TestCase):
         jsi = JSInterpreter('function $_xY1 ($_axY1) { var $_axY2 = $_axY1 + 1; return $_axY2; }')
         self.assertEqual(jsi.call_function('$_xY1', 20), 21)
 
+    # TODO test prefix and postfix operators
+
     def test_operators(self):
         jsi = JSInterpreter('function f(){return 1 << 5;}')
         self.assertEqual(jsi.call_function('f'), 32)
diff --git a/test/test_jsinterp_parser.py b/test/test_jsinterp_parser.py
index 7fba24d83..a1227e94b 100644
--- a/test/test_jsinterp_parser.py
+++ b/test/test_jsinterp_parser.py
@@ -630,13 +630,79 @@ class TestJSInterpreterParser(unittest.TestCase):
                ]
         self.assertEqual(list(jsi.statements()), ast)
 
-    @unittest.skip('Incomplete test: missing code and ast')
+    @unittest.skip('Test not yet implemented: missing ast')
     def test_if(self):
         # TODO if test
+        jsi = JSInterpreter(
+            '''
+            function a(x) {
+                if (x > 0)
+                    return true
+                else
+                    return false
+            }
+            '''
+        )
+        ast = []
+        self.assertEqual(list(jsi.statements()), ast)
+
+        jsi = JSInterpreter(
+            '''
+            function a(x) {
+                if (x > 0)
+                    return true
+                return false
+            }
+            '''
+        )
+        ast = []
+        self.assertEqual(list(jsi.statements()), ast)
+
+        jsi = JSInterpreter(
+            '''
+            function a(x) {
+                if (x > 0) {
+                    x--;
+                    return x;
+                } else {
+                    x++;
+                    return false;
+                }
+            }
+            '''
+        )
+        ast = []
+        self.assertEqual(list(jsi.statements()), ast)
+
+    @unittest.skip('Test not yet implemented: missing code and ast')
+    def test_with(self):
+        # TODO with test
         jsi = JSInterpreter('')
         ast = []
         self.assertEqual(list(jsi.statements()), ast)
 
+    @unittest.skip('Test not yet implemented: missing code and ast')
+    def test_switch(self):
+        # TODO switch test
+        jsi = JSInterpreter(
+            '''
+            function a(x) {
+                switch (x) {
+                    case x == 6:
+                        break;
+                    case x > 5:
+                        x++;
+                    case x == 6:
+                        x--;
+                    default:
+                        x = 0;
+                }
+            }
+            '''
+        )
+        ast = []
+        self.assertEqual(list(jsi.statements()), ast)
+
     def test_unshift(self):
         # https://hg.mozilla.org/mozilla-central/file/tip/js/src/tests/ecma_5/Array/unshift-01.js
         jsi = JSInterpreter(
diff --git a/youtube_dl/jsinterp/jsinterp.py b/youtube_dl/jsinterp/jsinterp.py
index e327130e9..9d655ed22 100644
--- a/youtube_dl/jsinterp/jsinterp.py
+++ b/youtube_dl/jsinterp/jsinterp.py
@@ -1,5 +1,4 @@
 from __future__ import unicode_literals
-from ..compat import compat_str
 
 import re