diff --git a/solutions/prime_number/tests_halilkaya.py b/solutions/prime_number/tests_halilkaya.py
new file mode 100644
index 0000000..2874073
--- /dev/null
+++ b/solutions/prime_number/tests_halilkaya.py
@@ -0,0 +1,27 @@
+import pytest
+from prime import is_prime
+
+
+def test_negative():
+    assert is_prime(-2) == False
+
+def test_zero():
+    assert is_prime(0) == False
+
+def test_less_than_two():
+    assert is_prime(1) == False
+
+def test_min_prime():
+    assert is_prime(2) == True
+
+def test_positive():
+    assert is_prime(47) == True
+
+def test_string():
+    with pytest.raises(TypeError):
+        is_prime('47')
+
+def test_float():
+    with pytest.raises(TypeError):
+        is_prime(49.9)
+