diff --git a/.vscode/settings.json b/.vscode/settings.json
index 3a7ba1cf..f6441a68 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,9 +2,9 @@
     "python.testing.unittestArgs": [
         "-v",
         "-s",
-        "./test",
+        "./",
         "-p",
-        "*test.py"
+        "*.py"
     ],
     "python.testing.pytestEnabled": false,
     "python.testing.unittestEnabled": true
diff --git a/test/__init__.py b/test/__init__.py
index 34db42e8..639513f5 100644
--- a/test/__init__.py
+++ b/test/__init__.py
@@ -11,3 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+try:
+    import utils # needed by vscode
+except:
+    pass
diff --git a/test/test_qlassf_builtin.py b/test/test_qlassf_builtin.py
index adbc9a2a..525ec529 100644
--- a/test/test_qlassf_builtin.py
+++ b/test/test_qlassf_builtin.py
@@ -80,9 +80,9 @@ def test_max_const(self):
         qf = qlassf(f, to_compile=COMPILATION_ENABLED, compiler=self.compiler)
         compute_and_compare_results(self, qf)
 
-    # TODO: fixed by cast
+    # TODO: fix cast
     # def test_max_const2(self):
-    #     f = "def test(a: Qint4) -> Qint2:\n\treturn max(a,3)"
+    #     f = "def test(a: Qint4) -> Qint4:\n\treturn max(a,3)"
     #     qf = qlassf(f, to_compile=COMPILATION_ENABLED, compiler=self.compiler)
     #     compute_and_compare_results(self, qf)
 
@@ -95,3 +95,15 @@ def test_max_tuple_const(self):
         f = "def test(a: Qint2, b: Qint2) -> Qint2:\n\treturn max((a, b))"
         qf = qlassf(f, to_compile=COMPILATION_ENABLED, compiler=self.compiler)
         compute_and_compare_results(self, qf)
+
+    # TODO:
+    # def test_len_of_range(self):
+    #     f = "def test() -> Qint4:\n\treturn len(range(4))"
+    #     qf = qlassf(f, to_compile=COMPILATION_ENABLED, compiler=self.compiler)
+    #     compute_and_compare_results(self, qf)
+
+    # TODO:
+    # def test_range_of_len(self):
+    #     f = "def test(a: Qlist[bool, 3]) -> Qint4:\n\treturn range(len(a))"
+    #     qf = qlassf(f, to_compile=COMPILATION_ENABLED, compiler=self.compiler)
+    #     compute_and_compare_results(self, qf)
diff --git a/test/test_qlassf_for_loop.py b/test/test_qlassf_for_loop.py
index cc022986..0b319ca0 100644
--- a/test/test_qlassf_for_loop.py
+++ b/test/test_qlassf_for_loop.py
@@ -63,10 +63,7 @@ def test_for_cond(self):
         qf = qlassf(f, to_compile=COMPILATION_ENABLED, compiler=self.compiler)
         compute_and_compare_results(self, qf)
 
-
-# TODO: a test to do
-# def hash(k: Qint4) -> bool:
-#     z = 1
-#     for i in range(3):
-#         z += i
-#     return z == 3
+    def test_for_sum(self):
+        f = "def hash(k: Qint4) -> bool:\n\tz = 1\n\tfor i in range(3):\n\t\tz += i\n\treturn z == 3"
+        qf = qlassf(f, to_compile=COMPILATION_ENABLED, compiler=self.compiler)
+        compute_and_compare_results(self, qf)