3 files changed, 7 insertions, 4 deletions
diff --git a/src/python/gudhi/cubical_complex.pyx b/src/python/gudhi/cubical_complex.pyx
index 31287d15..d5ad1266 100644
--- a/src/python/gudhi/cubical_complex.pyx
+++ b/src/python/gudhi/cubical_complex.pyx
@@ -17,6 +17,7 @@ from libcpp.string cimport string
 from libcpp cimport bool
 import errno
 import os
+import sys
 
 import numpy as np
 
diff --git a/src/python/test/test_cover_complex.py b/src/python/test/test_cover_complex.py
index 32bc5a26..260f6a5c 100755
--- a/src/python/test/test_cover_complex.py
+++ b/src/python/test/test_cover_complex.py
@@ -9,6 +9,7 @@
 """
 
 from gudhi import CoverComplex
+import pytest
 
 __author__ = "Vincent Rouvreau"
 __copyright__ = "Copyright (C) 2018 Inria"
@@ -24,7 +25,8 @@ def test_empty_constructor():
 def test_non_existing_file_read():
     # Try to open a non existing file
     cover = CoverComplex()
-    assert cover.read_point_cloud("pouetpouettralala.toubiloubabdou") == False
+    with pytest.raises(FileNotFoundError):
+        cover.read_point_cloud("pouetpouettralala.toubiloubabdou")
 
 
 def test_files_creation():
diff --git a/src/python/test/test_cubical_complex.py b/src/python/test/test_cubical_complex.py
index 8c1b2600..fce4875c 100755
--- a/src/python/test/test_cubical_complex.py
+++ b/src/python/test/test_cubical_complex.py
@@ -10,6 +10,7 @@
 
 from gudhi import CubicalComplex, PeriodicCubicalComplex
 import numpy as np
+import pytest
 
 __author__ = "Vincent Rouvreau"
 __copyright__ = "Copyright (C) 2016 Inria"
@@ -25,9 +26,8 @@ def test_empty_constructor():
 
 def test_non_existing_perseus_file_constructor():
     # Try to open a non existing file
-    cub = CubicalComplex(perseus_file="pouetpouettralala.toubiloubabdou")
-    assert cub.__is_defined() == False
-    assert cub.__is_persistence_defined() == False
+    with pytest.raises(FileNotFoundError):
+        cub = CubicalComplex(perseus_file="pouetpouettralala.toubiloubabdou")
 
 
 def test_dimension_or_perseus_file_constructor():