diff --git a/pydetector/ast_checks.py b/pydetector/ast_checks.py
index a04b32b..dd40e02 100644
--- a/pydetector/ast_checks.py
+++ b/pydetector/ast_checks.py
@@ -20,7 +20,7 @@
 
 
 def check_ast(code, try_other_on_sucess=False, verbosity=0,
-              py2_exec='python2', py3_exec='python3'):
+              py2_exec='/usr/bin/python2', py3_exec='/usr/bin/python3'):
     """
     Try with the ast.parse of both Python 2 and 3 and then
     iterate over the retrieved AST to find specific syntax elements.
diff --git a/pydetector/version.py b/pydetector/version.py
index 745162e..23f0070 100644
--- a/pydetector/version.py
+++ b/pydetector/version.py
@@ -1 +1 @@
-__version__ = "0.14.2"
+__version__ = "0.14.3"
diff --git a/tests/test_ast.py b/tests/test_ast.py
index 5611a33..e4033de 100644
--- a/tests/test_ast.py
+++ b/tests/test_ast.py
@@ -104,8 +104,8 @@ def test_positions_fstring(self):
         self.assertEqual(ast["body"][1]["value"]["values"][1]["lineno"], 2)
 
         # func() insde the braces
-        self.assertEqual(ast["body"][1]["value"]["values"][1]["value"]["col_offset"], 1)
-        self.assertEqual(ast["body"][1]["value"]["values"][1]["value"]["lineno"], 1)
+        self.assertEqual(ast["body"][1]["value"]["values"][1]["value"]["col_offset"], 22)
+        self.assertEqual(ast["body"][1]["value"]["values"][1]["value"]["lineno"], 2)
 
         # " string end"
         self.assertEqual(ast["body"][1]["value"]["values"][2]["col_offset"], 6)