diff --git a/.github/workflows/run_test.yaml b/.github/workflows/run_test.yaml
index 1a51154..75f5b6c 100644
--- a/.github/workflows/run_test.yaml
+++ b/.github/workflows/run_test.yaml
@@ -7,8 +7,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy: 
             matrix:
-                python-version: ["3.8"]
-
+                python-version: [3.8, 3.11]
         steps:
             - uses: actions/checkout@v3
             - name: Set up Python ${{ matrix.python-version }}
diff --git a/setup.py b/setup.py
index 46731cf..001cba0 100644
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,7 @@
         'IPython',
         'future',
         'numpy',
-        'katcp==0.9.3',
+        'katcp>=0.9.3',
         'katversion',
         'odict',
         'setuptools',
diff --git a/src/casperfpga.py b/src/casperfpga.py
index 529d27d..5d7e198 100644
--- a/src/casperfpga.py
+++ b/src/casperfpga.py
@@ -4,7 +4,11 @@
 import socket
 from time import strptime
 import string
-from collections.abc import Callable
+try:
+    from collections import Callable
+except(ImportError):
+    # starting in Python 3.10, Callable is in abc
+    from collections.abc import Callable
 
 from . import register
 from . import sbram
diff --git a/src/snapadc.py b/src/snapadc.py
index 6bc0f1f..2ad3f63 100644
--- a/src/snapadc.py
+++ b/src/snapadc.py
@@ -982,8 +982,9 @@ def isFrameClockAligned(self):
             logger.error('Frame clock NOT aligned.\n{0}'.format(str(errs)))
             return False
 
-    def rampTest(self, nchecks=300, retry=False):
-        chips = self.adcList
+    def rampTest(self, chips=None, nchecks=300, retry=False):
+        if chips is None:
+            chips = self.adcList
         self.logger.debug('Ramp test on ADCs: %s' % str(chips))
         failed_chips = {}
         self.setDemux(numChannel=1)
@@ -992,7 +993,7 @@ def rampTest(self, nchecks=300, retry=False):
         self.adc.test("en_ramp")
         for cnt in range(nchecks):
             self.snapshot()
-            for chip,d in self.readRAM(signed=False).items():
+            for chip,d in self.readRAM(chips, signed=False).items():
                 ans = (predicted + d[0,0]) % 256
                 failed_lanes = np.sum(d != ans, axis=0)
                 if np.any(failed_lanes) > 0:
@@ -1040,7 +1041,7 @@ def isLaneBonded(self, bondAllAdcs=False):
     def from_device_info(cls, parent, device_name, device_info, initialize=False, **kwargs):
         """
         Process device info and the memory map to get all the necessary info
-        and return a SKARAB ADC instance.
+        and return a ADC instance.
         :param parent: The parent device, normally a casperfpga instance
         :param device_name:
         :param device_info:
@@ -1049,4 +1050,8 @@ def from_device_info(cls, parent, device_name, device_info, initialize=False, **
         :param kwargs:
         :return:
         """
-        return cls(parent, device_name, device_info, initialize, **kwargs)
+        host = parent
+        #return cls(parent, device_name, device_info, initialize, **kwargs)
+        # XXX should device_info be passed as kwargs to cls? Would require renaming
+        # some parameters, so am not for now.
+        return cls(host)