diff --git a/tests/test_file.py b/tests/test_file.py
index 23ccde5..5cadf72 100644
--- a/tests/test_file.py
+++ b/tests/test_file.py
@@ -140,7 +140,7 @@ class Testlink():
     def test_link_a_file(self, tmpdir):
         file = str(tmpdir.join('test.txt'))
         link_file = str(tmpdir.join('test.link'))
-        open(file)
+        open(file, 'w')
         link(file, link_file)
         assert os.path.exists(link_file)
 
@@ -215,7 +215,7 @@ class Testcopy():
         link_f = str(tmpdir.join('test/test_link.txt'))
         d_copy = str(tmpdir.join('test_copy'))
         new_link_f = str(tmpdir.join('test_copy/test_link.txt'))
-        open(f)
+        open(f, 'w')
         os.symlink(f, link_f)
         copy(d, d_copy, follow_symlinks=True)
         assert os.path.exists(d_copy)
@@ -229,7 +229,7 @@ class Testcopy():
         link_f = str(tmpdir.join('test/test_link.txt'))
         d_copy = str(tmpdir.join('test_copy'))
         new_link_f = str(tmpdir.join('test_copy/test_link.txt'))
-        open(f)
+        open(f, 'w')
         os.symlink(f, link_f)
         copy(d, d_copy)
         assert os.path.exists(d_copy)
@@ -241,7 +241,7 @@ class Testcopy():
         file = str(tmpdir.join('test.txt'))
         link_file = str(tmpdir.join('test.link'))
         copy_link_file = str(tmpdir.join('test_copy.link'))
-        open(file)
+        open(file, 'w')
         link(file, link_file)
         copy(link_file, copy_link_file,follow_symlinks=True)
         assert os.path.exists(copy_link_file)
@@ -253,7 +253,7 @@ class Testcopy():
         file = str(tmpdir.join('test.txt'))
         link_file = str(tmpdir.join('test.link'))
         copy_link_file = str(tmpdir.join('test_copy.link'))
-        open(file)
+        open(file, 'w')
         link(file, link_file)
         copy(link_file, copy_link_file, follow_symlinks=False)
         assert os.path.exists(copy_link_file)