diff --git a/api/src/opentrons/drivers/absorbance_reader/async_byonoy.py b/api/src/opentrons/drivers/absorbance_reader/async_byonoy.py
index f2c32e217489..6223f896f4dd 100644
--- a/api/src/opentrons/drivers/absorbance_reader/async_byonoy.py
+++ b/api/src/opentrons/drivers/absorbance_reader/async_byonoy.py
@@ -24,7 +24,7 @@
 
 SN_PARSER = re.compile(r'ATTRS{serial}=="(?P<serial>.+?)"')
 VERSION_PARSER = re.compile(r"Absorbance (?P<version>V\d+\.\d+\.\d+)")
-SERIAL_PARSER = re.compile(r"SN: (?P<serial>BYO[A-Z]{3}[0-9]{5})")
+SERIAL_PARSER = re.compile(r"(?P<serial>BYO[A-Z]{3}[0-9]{5})")
 
 
 class AsyncByonoy:
diff --git a/api/tests/opentrons/drivers/absorbance_reader/test_driver.py b/api/tests/opentrons/drivers/absorbance_reader/test_driver.py
index 685dcbd21501..0284f277e2cc 100644
--- a/api/tests/opentrons/drivers/absorbance_reader/test_driver.py
+++ b/api/tests/opentrons/drivers/absorbance_reader/test_driver.py
@@ -79,8 +79,8 @@ async def test_driver_get_device_info(
 ) -> None:
 
     DEVICE_INFO = MagicMock(AbsorbanceHidInterface.DeviceInfo)
-    DEVICE_INFO.ref_no = ""
-    DEVICE_INFO.sn = "SN: BYOMAA00013 REF: DE MAA 001"
+    DEVICE_INFO.ref_no = "DE MAA 001"
+    DEVICE_INFO.sn = "BYOMAA00013"
     DEVICE_INFO.version = "Absorbance V1.0.2 2024-04-18"
 
     mock_interface.get_device_information.return_value = (