diff --git a/week12/tasks/tests.py b/week12/tasks/tests.py
index 32c9089..97fa544 100644
--- a/week12/tasks/tests.py
+++ b/week12/tasks/tests.py
@@ -8,11 +8,7 @@
 import min_number
 import words_count
 import head
-import tail
 import last
-import take
-import drop
-import reverse
 
 doctest.testmod(for_traverse)
 doctest.testmod(while_traverse)
@@ -22,8 +18,4 @@
 doctest.testmod(min_number)
 doctest.testmod(words_count)
 doctest.testmod(head)
-doctest.testmod(tail)
 doctest.testmod(last)
-doctest.testmod(take)
-doctest.testmod(drop)
-doctest.testmod(reverse)
diff --git a/week12/tasks/drop.py b/week13/tasks/drop.py
similarity index 100%
rename from week12/tasks/drop.py
rename to week13/tasks/drop.py
diff --git a/week12/tasks/reverse.py b/week13/tasks/reverse.py
similarity index 100%
rename from week12/tasks/reverse.py
rename to week13/tasks/reverse.py
diff --git a/week12/tasks/tail.py b/week13/tasks/tail.py
similarity index 100%
rename from week12/tasks/tail.py
rename to week13/tasks/tail.py
diff --git a/week12/tasks/take.py b/week13/tasks/take.py
similarity index 100%
rename from week12/tasks/take.py
rename to week13/tasks/take.py
diff --git a/week13/tasks/tests.py b/week13/tasks/tests.py
new file mode 100644
index 0000000..847f377
--- /dev/null
+++ b/week13/tasks/tests.py
@@ -0,0 +1,11 @@
+import doctest
+
+import tail
+import take
+import drop
+import reverse
+
+doctest.testmod(tail)
+doctest.testmod(take)
+doctest.testmod(drop)
+doctest.testmod(reverse)