diff --git a/docs/source/api-reference.rst b/docs/source/api-reference.rst
index e709867..043348e 100644
--- a/docs/source/api-reference.rst
+++ b/docs/source/api-reference.rst
@@ -30,8 +30,6 @@ API Reference
 .. autoclass:: sure.core.DeepExplanation
 .. _deep comparison:
 .. autoclass:: sure.core.DeepComparison
-.. autofunction:: sure.core._get_file_name
-.. autofunction:: sure.core._get_line_number
 .. autofunction:: sure.core.itemize_length
 
 
@@ -66,6 +64,7 @@ API Reference
 .. py:module:: sure.reporters
 .. autoclass:: sure.reporters.feature.FeatureReporter
 
+
 ``sure.original``
 -----------------
 
@@ -75,7 +74,6 @@ API Reference
 .. autofunction:: sure.original.all_integers
 .. autofunction:: sure.original.explanation
 
-
 ``sure.doubles``
 ----------------
 
@@ -84,6 +82,7 @@ API Reference
 .. autoclass:: sure.doubles.FakeOrderedDict
 .. autoattribute:: sure.doubles.anything
 
+
 ``sure.doubles.dummies``
 ------------------------
 
diff --git a/sure/__init__.py b/sure/__init__.py
index ba44fbf..e719b0e 100644
--- a/sure/__init__.py
+++ b/sure/__init__.py
@@ -35,11 +35,11 @@
 from sure import runtime
 from sure.core import DeepComparison
 from sure.core import DeepExplanation
-from sure.core import _get_file_name
-from sure.core import _get_line_number
 from sure.errors import SpecialSyntaxDisabledError
 from sure.errors import InternalRuntimeError
 from sure.doubles.dummies import anything
+from sure.loader import get_file_name
+from sure.loader import get_line_number
 from sure.version import version
 from sure.special import is_cpython, patchable_builtin
 from sure.registry import context as _registry
@@ -339,8 +339,8 @@ def ensure_providers(func, attr, args, kwargs):
 
     def check_dependencies(func):
         action = func.__name__
-        filename = _get_file_name(func)
-        lineno = _get_line_number(func)
+        filename = get_file_name(func)
+        lineno = get_line_number(func)
 
         for dependency in depends_on:
             if dependency in context.__sure_providers_of__:
@@ -354,7 +354,7 @@ def check_dependencies(func):
                 err += "\n".join(
                     [
                         " -> %s at %s:%d"
-                        % (p.__name__, _get_file_name(p), _get_line_number(p))
+                        % (p.__name__, get_file_name(p), get_line_number(p))
                         for p in providers
                     ]
                 )
diff --git a/sure/cli.py b/sure/cli.py
index 5a0ff39..545d557 100644
--- a/sure/cli.py
+++ b/sure/cli.py
@@ -83,6 +83,8 @@ def entrypoint(paths, reporter, immediate, log_level, log_file, special_syntax,
             raise ExitError(runner.context, result)
 
         elif cov:
+            sys.stdout = sys.__stdout__
+            sys.stderr = sys.__stderr__
             cov.stop()
             cov.save()
             cov.report()
diff --git a/sure/core.py b/sure/core.py
index 367a3b9..5126e29 100644
--- a/sure/core.py
+++ b/sure/core.py
@@ -14,10 +14,8 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-import os
-import inspect
-
 from collections import OrderedDict
+from functools import cache
 from six import (
     text_type, integer_types, string_types, binary_type,
     get_function_code
@@ -50,6 +48,8 @@ def __init__(self, X, Y, epsilon=None, parent=None):
             float: self.compare_floats,
             dict: self.compare_ordered_dicts,
             list: self.compare_iterables,
+            set: self.compare_iterables,
+            frozenset: self.compare_iterables,
             tuple: self.compare_iterables,
             OrderedDict: self.compare_ordered_dicts
         }
@@ -144,10 +144,8 @@ def compare_ordered_dicts(self, X, Y):
                 return DeepExplanation(msg)
         return True
 
+    @cache
     def get_context(self):
-        if self._context:
-            return self._context
-
         X_keys = []
         Y_keys = []
 
@@ -168,8 +166,7 @@ class ComparisonContext:
             current_Y_keys = get_keys(Y_keys)
             parent = comp
 
-        self._context = ComparisonContext()
-        return self._context
+        return ComparisonContext()
 
     def compare_iterables(self, X, Y):
         len_X, len_Y = map(len, (X, Y))
@@ -242,22 +239,6 @@ def explanation(self):
         return self._explanation
 
 
-def _get_file_name(func):
-    try:
-        name = inspect.getfile(func)
-    except AttributeError:
-        name = get_function_code(func).co_filename
-
-    return os.path.abspath(name)
-
-
-def _get_line_number(func):
-    try:
-        return inspect.getlineno(func)
-    except AttributeError:
-        return get_function_code(func).co_firstlineno
-
-
 def itemize_length(items):
     length = len(items)
     return '{0} item{1}'.format(length, length > 1 and "s" or "")
diff --git a/sure/loader.py b/sure/loader.py
index 93274e9..04ac427 100644
--- a/sure/loader.py
+++ b/sure/loader.py
@@ -1,9 +1,11 @@
 import os
 import sys
 import ast
+import types
 import importlib
 import importlib.util
-from typing import Dict, List, Union, Tuple
+
+from typing import Dict, List, Optional, Tuple, Union
 from importlib.machinery import PathFinder
 from pathlib import Path
 from sure.errors import InternalRuntimeError
@@ -13,6 +15,42 @@
 __TEST_CLASSES__ = {}
 
 
+def get_file_name(func) -> str:
+    """returns the file name of a given function or method"""
+    return FunMeta.from_function_or_method(func).filename
+
+
+def get_line_number(func) -> str:
+    """returns the first line number of a given function or method"""
+    return FunMeta.from_function_or_method(func).line_number
+
+
+class FunMeta(object):
+    """container for metadata specific to Python functions or methods"""
+    filename: str
+    line_number: int
+    name: str
+
+    def __init__(self, filename: str, line_number: int, name: str):
+        self.filename = collapse_path(filename)
+        self.line_number = line_number
+        self.name = name
+
+    def __repr__(self):
+        return f'<FunMeta filename={repr(self.filename)} line_number={repr(self.line_number)} name={repr(self.name)}>'
+
+    @classmethod
+    def from_function_or_method(cls, func):
+        if not isinstance(func, (types.FunctionType, types.MethodType)):
+            raise TypeError(f'get_function_or_method_metadata received an unexpected object: {func}')
+
+        return cls(
+            filename=func.__code__.co_filename,
+            line_number=func.__code__.co_firstlineno,
+            name=func.__name__,
+        )
+
+
 def name_appears_to_indicate_test(name: str) -> bool:
     return name.startswith('Test') or name.endswith('Test')
 
@@ -93,6 +131,10 @@ def resolve_path(path, relative_to="~") -> Path:
     return Path(path).absolute().relative_to(Path(relative_to).expanduser())
 
 
+def collapse_path(e: Union[str, Path]) -> str:
+    return str(e).replace(os.getenv("HOME"), "~")
+
+
 def get_package(path) -> Path:
     if not isinstance(path, Path):
         path = Path(path)
diff --git a/sure/original.py b/sure/original.py
index 96ef93f..df8a5b1 100644
--- a/sure/original.py
+++ b/sure/original.py
@@ -35,9 +35,9 @@
 from six import string_types, text_type
 
 from sure.core import DeepComparison
-from sure.core import _get_file_name
-from sure.core import _get_line_number
 from sure.core import itemize_length
+from sure.loader import get_file_name
+from sure.loader import get_line_number
 
 
 def identify_callable_location(callable_object):
diff --git a/sure/runtime.py b/sure/runtime.py
index 6aa91e1..2f88f82 100644
--- a/sure/runtime.py
+++ b/sure/runtime.py
@@ -38,6 +38,7 @@
 )
 from sure.loader import (
     loader,
+    collapse_path,
     get_type_definition_filename_and_firstlineno,
 )
 from sure.reporter import Reporter
@@ -117,10 +118,12 @@ def __init__(self, test, module_or_instance=None):
             self.name = test.__class__.__name__
             self.filename, self.line = get_type_definition_filename_and_firstlineno(test.__class__)
             self.kind = test.__class__
+
         elif isinstance(test, type):
             self.name = test.__name__
             self.filename, self.line = get_type_definition_filename_and_firstlineno(test)
             self.kind = test
+
         else:
             raise NotImplementedError(f"{test} of type {type(test)} is not yet supported by {TestLocation}")
 
@@ -765,7 +768,7 @@ def __getattr__(self, attr):
         try:
             return self.__getattribute__(attr)
         except AttributeError:
-            return getattr(self.scenario_results[-1], attr, fallback)
+            return getattr(self.scenario_results[-1], attr)
 
     @property
     def is_failure(self):
@@ -843,7 +846,7 @@ def __getattr__(self, attr):
         try:
             return self.__getattribute__(attr)
         except AttributeError:
-            return getattr(self.scenario_results[-1], attr, fallback)
+            return getattr(self.scenario_results[-1], attr)
 
     @property
     def is_failure(self):
@@ -920,7 +923,7 @@ def __getattr__(self, attr):
         try:
             return self.__getattribute__(attr)
         except AttributeError:
-            return getattr(self.feature_results[-1], attr, fallback)
+            return getattr(self.feature_results[-1], attr)
 
     @property
     def is_failure(self):
@@ -957,7 +960,3 @@ def first_nonsuccessful_result(self) -> Optional[FeatureResult]:
 
 def stripped(string):
     return collapse_path("\n".join(filter(bool, [s.strip() for s in string.splitlines()])))
-
-
-def collapse_path(e: str):
-    return str(e).replace(os.getenv("HOME"), "~")
diff --git a/tests/test_original_api.py b/tests/test_original_api.py
index df9a5f3..c466178 100644
--- a/tests/test_original_api.py
+++ b/tests/test_original_api.py
@@ -15,11 +15,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import os
 import sure
 from sure import that
 from sure import expect
 from sure import VariablesBag
 from sure.special import is_cpython
+from sure.loader import collapse_path
 
 
 def test_setup_with_context():
@@ -52,7 +54,7 @@ def it_crashes():
     assert that(it_crashes).raises(
         TypeError,
         (
-            "the function it_crashes defined at test_original_api.py line 49, is being "
+            "the function it_crashes defined at test_original_api.py line 51, is being "
             "decorated by either @that_with_context or @scenario, so it should "
             "take at least 1 parameter, which is the test context"
         ),
@@ -925,12 +927,11 @@ def the_providers_are_working(the):
 
 def test_depends_on_failing_due_to_lack_of_attribute_in_context():
     "it fails when an action depends on some attribute that is not " "provided by any other previous action"
-    import os
     from sure import action_for, scenario
 
-    fullpath = os.path.abspath(__file__)
+    fullpath = collapse_path(collapse_path(os.path.abspath(__file__)))
     error = (
-        'the action "variant_action" defined at %s:940 '
+        'the action "variant_action" defined at %s:941 '
         'depends on the attribute "data_structure" to be available in the'
         " context. It turns out that there are no actions providing "
         "that. Please double-check the implementation" % fullpath
@@ -952,10 +953,9 @@ def depends_on_fails(the):
 def test_depends_on_failing_due_not_calling_a_previous_action():
     "it fails when an action depends on some attribute that is being " "provided by other actions"
 
-    import os
     from sure import action_for, scenario
 
-    fullpath = os.path.abspath(__file__)
+    fullpath = collapse_path(os.path.abspath(__file__))
     error = (
         'the action "my_action" defined at {0}:971 '
         'depends on the attribute "some_attr" to be available in the context.'