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diff --git a/tests/test_detection.py b/tests/test_detection.py
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+++ b/tests/test_detection.py
@@ -0,0 +1,53 @@
+from pathlib import Path
+
+import numpy as np
+import pytest
+
+import dopt_sensor_anomalies.detection as detect
+import dopt_sensor_anomalies.types as t
+
+
+@pytest.fixture(scope="module")
+def img_paths() -> tuple[Path, ...]:
+    img_folder = Path(__file__).parent / "_img"
+    if not img_folder.exists():
+        raise FileNotFoundError("img path not existing")
+    return tuple(img_folder.glob("*.bmp"))
+
+
+def test_midpoint():
+    ptA = np.array([1.0, 2.0])
+    ptB = np.array([3.0, 4.0])
+    mid_x, mid_y = detect.midpoint(ptA, ptB)
+    assert mid_x == 2.0
+    assert mid_y == 3.0
+
+
+@pytest.mark.new
+def test_check_box_redundancy_SameBox():
+    box_1: t.Box = (
+        (64.70450592041016, 505.09185791015625),
+        (32.305301666259766, 162.31748962402344),
+        2.385944128036499,
+    )
+    box_2: t.Box = (
+        (64.5450592041016, 504.59185791015625),
+        (32.305301666259766, 163.01748962402344),
+        2.415944128036499,
+    )
+    assert detect.check_box_redundancy(box_1, box_2)
+
+
+@pytest.mark.new
+def test_check_box_redundancy_DifferentBox():
+    box_1: t.Box = (
+        (64.70450592041016, 505.09185791015625),
+        (32.305301666259766, 162.31748962402344),
+        2.385944128036499,
+    )
+    box_2: t.Box = (
+        (84.5450592041016, 104.59185791015625),
+        (31.305301666259766, 150.01748962402344),
+        2.35944128036499,
+    )
+    assert not detect.check_box_redundancy(box_1, box_2)