diff --git a/solutions/prime_number/tests_hakanensep.py b/solutions/prime_number/tests_hakanensep.py
new file mode 100644
index 0000000..aade615
--- /dev/null
+++ b/solutions/prime_number/tests_hakanensep.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+from prime import is_prime
+
+def test_good():
+	assert is_prime(3) is True
+def test_one():
+	assert is_prime(1) is False
+def test_string():
+	assert is_prime('1') is False
+def test_some():
+	assert is_prime('') is False
+def test_negative():
+	assert is_prime(-1) is False
+def test_string():
+	assert is_prime("test") is False