diff --git a/tests/requirements.txt b/tests/requirements.txt
index 55e3ccec..08051620 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -4,7 +4,6 @@ pytest-cov
 pypng~=0.0.20
 pyzbar~=0.1.8
 qrcode-artistic
-opencv-python; platform.python_implementation != 'PyPy'
 Pillow
 importlib-metadata>=3.6.0; python_version < '3.10'
 
diff --git a/tests/test_encode_decode.py b/tests/test_encode_decode.py
index bedd372e..d8bdca5b 100644
--- a/tests/test_encode_decode.py
+++ b/tests/test_encode_decode.py
@@ -13,19 +13,19 @@
 import io
 import pytest
 import segno
-_cv_available = True
-try:
-    import cv2 as cv
-    import numpy as np
-except (ImportError):
-    _cv_available = False
+import platform
 try:
     from pyzbar.pyzbar import decode as zbardecode
 except (ImportError, FileNotFoundError):  # The latter may occur under Windows
     pytestmark = pytest.mark.skip
 
+_libc, _ = platform.libc_ver()
+IS_MUSL = _libc != 'glibc'
+
 
-def decode_zbar(qrcode):
+def decode(qrcode):
+    if qrcode.is_micro:
+        raise Exception('Cannot decode Micro QR codes')
     scale = 3
     width, height = qrcode.symbol_size(scale=scale)
     out = io.BytesIO()
@@ -37,29 +37,9 @@ def decode_zbar(qrcode):
     return decoded[0].data.decode('utf-8')
 
 
-def decode_cv(qrcode):
-    out = io.BytesIO()
-    qrcode.save(out, scale=3, kind='png')
-    out.seek(0)
-    img = cv.imdecode(np.frombuffer(out.getvalue(), np.uint8), flags=cv.IMREAD_COLOR)
-    detector = cv.QRCodeDetector()
-    decoded, points, qrcode_bin = detector.detectAndDecode(img)
-    return decoded or None
-
-
-def decode(qrcode):
-    if qrcode.is_micro:
-        raise Exception('Cannot decode Micro QR codes')
-    # OpenCV does not support Kanji
-    if _cv_available and qrcode.mode != 'kanji':
-        return decode_cv(qrcode)
-    return decode_zbar(qrcode)
-
-
 @pytest.mark.parametrize('content, mode',
                          [('漢字', 'kanji'),
                           ('続きを読む', 'kanji'),
-                          ('Märchenbücher', 'byte'),
                           ('汉字', 'byte'),
                           ])
 def test_encode_decode(content, mode):
@@ -68,15 +48,21 @@ def test_encode_decode(content, mode):
     assert content == decode(qr)
 
 
+@pytest.mark.skipif(IS_MUSL, reason="zbar does not support latin1 with musl")  # See <https://github.com/heuer/segno/issues/134>
+def test_encode_decode_latin1():
+    content = 'Märchenbücher'
+    qr = segno.make_qr(content)
+    assert 'byte' == qr.mode
+    assert content == decode(qr)
+
+
 def test_stackoverflow_issue():
     # See <https://stackoverflow.com/questions/63303624/generating-and-reading-qr-codes-with-special-characters>
     # and <https://github.com/NaturalHistoryMuseum/pyzbar/issues/14>
     content = 'Thomsôn Gonçalves Ámaral,325.432.123-21'
     qr = segno.make(content, encoding='utf-8')
     assert 'byte' == qr.mode
-    decoded = decode(qr)
-    if not _cv_available:
-        decoded = decoded.encode('shift-jis').decode('utf-8')
+    decoded = decode(qr).encode('shift-jis').decode('utf-8')
     assert content == decoded
 
 
@@ -94,15 +80,6 @@ def test_pyqrcode_issue76():
     assert content == decode(qr)
 
 
-@pytest.mark.skipif(not _cv_available, reason="Requires OpenCV")
-@pytest.mark.parametrize('encoding', [None, 'latin1', 'ISO-8859-1', 'utf-8'])
-def test_issue134(encoding):
-    # See <https://github.com/heuer/segno/issues/134>
-    content = 'Märchen'
-    qr = segno.make(content, encoding=encoding, micro=False)
-    assert 'byte' == qr.mode
-    assert content == decode(qr)
-
 
 if __name__ == '__main__':
     pytest.main([__file__])
diff --git a/tests/test_issue_109_bytes.py b/tests/test_issue_109_bytes.py
index d16d1e81..92714e56 100644
--- a/tests/test_issue_109_bytes.py
+++ b/tests/test_issue_109_bytes.py
@@ -11,6 +11,7 @@
 
 Requires pyzbar and additional libs (libzbar0).
 """
+import platform
 import io
 import pytest
 import segno
@@ -19,6 +20,11 @@
 except (ImportError, FileNotFoundError):  # The latter may occur under Windows
     pytestmark = pytest.mark.skip
 
+_libc, _ = platform.libc_ver()
+
+if _libc != 'glibc':  # Does not work with zbar/musl
+    pytestmark = pytest.mark.skip
+
 
 def decode(qrcode):
     scale = 3