diff --git a/.gitignore b/.gitignore
index db3d538..89da754 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,3 +46,6 @@ _build
 .idea
 .vscode
 *~
+
+# Test coverage reports
+.coverage
diff --git a/.reuse/dep5 b/.reuse/dep5
new file mode 100644
index 0000000..c03fdb0
--- /dev/null
+++ b/.reuse/dep5
@@ -0,0 +1,7 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: Adafruit_CircuitPython_miniQR
+Source: https://github.com/adafruit/Adafruit_CircuitPython_miniQR
+
+Files: tests/*.gild
+Copyright: 2019 Translation Company
+License: Unlicense
diff --git a/adafruit_miniqr.py b/adafruit_miniqr.py
index 55b1cae..633fb63 100644
--- a/adafruit_miniqr.py
+++ b/adafruit_miniqr.py
@@ -95,7 +95,7 @@ def add_data(self, data):
         self.data_list.append(data)
         datalen = sum(len(x) for x in self.data_list)
         if not self.type:
-            for qr_type in range(1, 6):
+            for qr_type in range(1, 10):
                 rs_blocks = _get_rs_blocks(qr_type, self.ECC)
                 total_data_count = 0
                 for block in rs_blocks:
diff --git a/tests/test_example.gild b/tests/test_example.gild
new file mode 100644
index 0000000..0f66b61
--- /dev/null
+++ b/tests/test_example.gild
@@ -0,0 +1,25 @@
+XXXXXXX.X.........XXXXXXX
+X.....X.X.XX.XXXX.X.....X
+X.XXX.X.X.X.XXXXX.X.XXX.X
+X.XXX.X..X...XXXX.X.XXX.X
+X.XXX.X.X..XXXXXX.X.XXX.X
+X.....X.X.XXXX.XX.X.....X
+XXXXXXX.X.X.X.X.X.XXXXXXX
+........X..X...X.........
+..X...XXX.XX.XXXXXXXX.XXX
+.X.XX....X.X.XX..X.XXXXX.
+X....XX...XXXX.XX.X....X.
+..X..X.X.XX.XX.X.XX.XX.XX
+...XXXX.XXXX....XXXXX..XX
+.X..XX.XXX.XX.XXXXXXX.XXX
+.X.XX.XX.X..X.....XX...X.
+XXXXXX.....X...X.XX....XX
+..XX..XXXX..XXXXXXXXX.XXX
+........X.X.X.X.X...XX...
+XXXXXXX.XXXXXXXXX.X.X..X.
+X.....X...X.X.X.X...XX..X
+X.XXX.X........XXXXXXXXX.
+X.XXX.X.....XX..XXXXXX.X.
+X.XXX.X.X.X...X......X...
+X.....X...XXX.XX.XXX...XX
+XXXXXXX..XX.XXX..XX...X.X
diff --git a/tests/test_unit.py b/tests/test_unit.py
new file mode 100644
index 0000000..218a3de
--- /dev/null
+++ b/tests/test_unit.py
@@ -0,0 +1,98 @@
+# SPDX-FileCopyrightText: 2024 James Bowman
+#
+# SPDX-License-Identifier: MIT
+
+import unittest
+import random
+
+import adafruit_miniqr
+
+
+def enc(msg, **args):
+    _q = adafruit_miniqr.QRCode(**args)
+    _q.add_data(msg)
+    _q.make()
+    return _q.matrix
+
+
+class TestMiniQR(unittest.TestCase):
+    def test_example(self):
+        # Confirm the simple test that is in the docs
+        msg = b"https://www.adafruit.com"
+        _qr = adafruit_miniqr.QRCode()
+        _qr.add_data(msg)
+        _qr.make()
+        with open("tests/test_example.gild") as _f:
+            self.assertEqual(_f.read(), repr(_qr.matrix))
+
+    def test_qr_type(self):
+        # Confirm that qr_type 1-9 increases the matrix size
+        expected_size = [None, 21, 25, 29, 33, 37, 41, 45, 49, 53]
+        for _t in range(1, 10):
+            _m = enc(b"abc", qr_type=_t)
+            self.assertEqual(_m.width, _m.height)
+            self.assertEqual(_m.width, expected_size[_t])
+
+    def test_qr_error_correct(self):
+        # Confirm that error correct L,M,Q,H give different matrix
+        matrices = set()
+        for _ec in (
+            adafruit_miniqr.L,
+            adafruit_miniqr.M,
+            adafruit_miniqr.Q,
+            adafruit_miniqr.H,
+        ):
+            _m = enc(b"abc", error_correct=_ec)
+            matrices.add(_m)
+        self.assertEqual(len(matrices), 4)  # All 4 are unique
+
+    def test_qr_pattern_mask(self):
+        # Confirm that pattern_mask 0-7 gives different matrix
+        matrices = set()
+        _qr = adafruit_miniqr.QRCode()
+        _qr.add_data("test_qr_pattern_mask/1Z")
+        for _m in range(8):
+            _qr.make(mask_pattern=_m)
+            matrices.add(tuple(_qr.matrix.buffer))
+        self.assertEqual(len(matrices), 8)  # All 8 are unique
+
+    def test_qr_auto(self):
+        # Confirm that increasing message size increases the matrix size monotonically
+        sizes = []
+        for i in range(29):
+            msg = b"aBc!1234" * i
+            _m = enc(msg)
+            sizes.append(_m.width)
+        self.assertTrue(len(set(sizes)) > 1)
+        self.assertEqual(sizes, sorted(sizes))
+
+    def test_qr_str(self):
+        # Confirm that bytes and str give the same result
+        for _s in ("", "abc", "https://www.adafruit.com", "AbCd12"):
+            _a = enc(_s.encode())
+            _b = enc(_s)
+            self.assertEqual(_a.buffer, _b.buffer)
+
+    def test_qr_all(self):
+        for _ty in range(1, 10):
+            for _ec in (
+                adafruit_miniqr.L,
+                adafruit_miniqr.M,
+                adafruit_miniqr.Q,
+                adafruit_miniqr.H,
+            ):
+                _qr = adafruit_miniqr.QRCode(qr_type=_ty, error_correct=_ec)
+                _qr.add_data("abc")
+                for _m in range(8):
+                    _qr.matrix = None
+                    _qr.make(mask_pattern=_m)
+                    self.assertTrue(_qr.matrix is not None)
+
+    def test_qr_maximum(self):
+        msg = bytes([random.randrange(32, 127) for i in range(230)])
+        _a = enc(msg)
+        self.assertTrue(_a is not None)
+
+
+if __name__ == "__main__":
+    unittest.main()