diff --git a/tests/test_referee.py b/tests/test_referee.py
new file mode 100644
index 0000000..6cb9fa4
--- /dev/null
+++ b/tests/test_referee.py
@@ -0,0 +1,55 @@
+import pytest
+from src.referee import Difficulty, decide_difficulty
+
+@pytest.fixture
+def TRIVIAL_CONTEXT():
+    return """
+    You are trying to walk down the street. 
+    It is good weather and you are wearing comfortable shoes.
+    The street is flat and there are no obstacles in your way.
+    """
+
+@pytest.fixture
+def VERY_EASY_CONTEXT():
+    return """
+    You try to throw a ball into a basket a few meters away, but the sun is shining in your eyes.
+    """
+
+@pytest.fixture
+def EASY_CONTEXT():
+    return """
+    An easy task.
+    """
+
+@pytest.fixture
+def MEDIUM_CONTEXT():
+    return "You are trying to climb a tree. The tree is not very tall and has many branches."
+
+@pytest.fixture
+def HARD_CONTEXT():
+    return "You are trying to climb a tree. The tree is very tall and has few branches."
+
+@pytest.fixture
+def NEARLY_IMPOSSIBLE_CONTEXT():
+    return """
+    You are trying to climb a tree. In a storm. The tree is very tall and no branches.
+    The tree is also covered in oil. And you are wearing a heavy backpack.
+    """
+
+contexts = [
+    (TRIVIAL_CONTEXT, Difficulty.TRIVIAL.value, Difficulty.VERY_EASY.value),
+    (VERY_EASY_CONTEXT, Difficulty.TRIVIAL.value, Difficulty.EASY.value),
+    (EASY_CONTEXT, Difficulty.VERY_EASY.value, Difficulty.MEDIUM.value),
+    (MEDIUM_CONTEXT, Difficulty.EASY.value, Difficulty.HARD.value),
+    (HARD_CONTEXT, Difficulty.MEDIUM.value, Difficulty.NEARLY_IMPOSSIBLE.value)
+]
+
+@pytest.mark.apitest
+@pytest.mark.parametrize("context, expected_min_difficulty, expected_max_difficulty", contexts)
+def test_decide_difficulty(context, expected_min_difficulty, expected_max_difficulty):
+    # Arrange (already done by the parameters)
+    # Act
+    difficulty = decide_difficulty(context)
+    # Assert
+    assert difficulty >= expected_min_difficulty, "Difficulty was lower than the minimum"
+    assert difficulty <= expected_max_difficulty, "Difficulty was higher then the maximum"