diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2f10d2a..72d2d0f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Fixed
+- Parser opened file upon being created rather than when starting to parse, leading to parsing of the same file several types after resetting the system (issue [#28](https://github.com/SimGus/Chatette/issues/28))
 - One escapable character was missing, leading to escape character not being removed for `]` (issue [#27](https://github.com/SimGus/Chatette/issues/27))
 
 ## [1.6.1] - 2019-11-11
diff --git a/TODOs.md b/TODOs.md
index 76920ed7..fefde5d5 100644
--- a/TODOs.md
+++ b/TODOs.md
@@ -75,6 +75,7 @@
 <!-- - [ ] rewrite docstrings formatted as explained in *PEP257* -->
 - [ ] replace `print` by `six.print_`?
 - [ ] add more unit tests
+- [ ] refactor facade (and its interactions with parser, generator and adapter)
 
 ### Improve performance
 - [ ] cache the possible number of generatable examples for each unit
diff --git a/chatette/facade.py b/chatette/facade.py
index e8a6c5e3..1892ef11 100644
--- a/chatette/facade.py
+++ b/chatette/facade.py
@@ -33,6 +33,7 @@ def __init__(self,
         master_file_path, output_dir_path=None, adapter_str="rasa",
         base_filepath=None, local=False, seed=None, force_overwriting=False
     ):
+        self.master_file_path = master_file_path
         if local:
             self.output_dir_path = os.path.dirname(master_file_path)
         else:
@@ -57,7 +58,7 @@ def __init__(self,
             adapter_str, base_filepath
         )
 
-        self.parser = Parser(master_file_path)
+        self.parser = Parser()
         self.generator = None
 
     @classmethod
@@ -91,14 +92,13 @@ def run(self):
 
     def run_parsing(self):
         """Executes the parsing alone."""
-        self.parser.parse()
+        self.parser.parse_file(self.master_file_path)
 
     def parse_file(self, file_path):
         """
         Parses the new template file at `file_path` with the current parser.
         """
-        self.parser.open_new_file(file_path)
-        self.parser.parse()
+        self.parser.parse_file(file_path)
 
     def run_generation(self, adapter_str=None):
         """"
diff --git a/chatette/parsing/parser.py b/chatette/parsing/parser.py
index 86fe13b1..e2563bdf 100644
--- a/chatette/parsing/parser.py
+++ b/chatette/parsing/parser.py
@@ -35,7 +35,7 @@
 
 
 class Parser(object):
-    def __init__(self, master_file_path):
+    def __init__(self, master_file_path=None):
         if (
             master_file_path is not None
             and not isinstance(master_file_path, string_types)
@@ -47,7 +47,7 @@ def __init__(self, master_file_path):
         self._master_filepath = master_file_path
 
         self.input_file_manager = \
-            InputFileManager.get_or_create(master_file_path)
+            InputFileManager.get_or_create()
         self.lexer = Lexer()
         self.ast = AST.get_or_create()
 
@@ -77,12 +77,14 @@ def open_new_file(self, filepath):
             print_warn(err_msg)
     
 
-    def parse(self):
+    def parse_file(self, file_path):
         """
-        Parses the template file(s) and translates them into an AST.
+        Parses the template file(s) at `file_path`
+        and translates them into an AST.
         """
+        self.open_new_file(file_path)
         print_DBG(
-            "Parsing master file: " + \
+            "Parsing file: " + \
             self.input_file_manager.get_current_file_name()
         )
 
diff --git a/tests/system-testing/test_system.py b/tests/system-testing/test_system.py
index c01bf2b5..5a25eefb 100644
--- a/tests/system-testing/test_system.py
+++ b/tests/system-testing/test_system.py
@@ -43,8 +43,8 @@ def get_or_create():
     def run(self, template_filepath):
         AST.reset_instance()
 
-        parser = Parser(template_filepath)
-        parser.parse()
+        parser = Parser()
+        parser.parse_file(template_filepath)
 
         self.generator = Generator()
         self.train_examples = list(self.generator.generate_train())