diff --git a/makefile b/makefile
index 7dbc143..25099b5 100644
--- a/makefile
+++ b/makefile
@@ -6,7 +6,7 @@ PACKAGE_NAME := pycalver
 # - `make ipy`
 # - `make lint`
 # - `make devtest`
-DEVELOPMENT_PYTHON_VERSION := python=3.7
+DEVELOPMENT_PYTHON_VERSION := python=3.8
 
 # These must be valid (space separated) conda package names.
 # A separate conda environment will be created for each of these.
@@ -18,7 +18,7 @@ DEVELOPMENT_PYTHON_VERSION := python=3.7
 # - python=3.7
 # - pypy2.7
 # - pypy3.5
-SUPPORTED_PYTHON_VERSIONS := python=2.7 python=3.5 python=3.6 python=3.7 pypy2.7 pypy3.5
+SUPPORTED_PYTHON_VERSIONS := python=2.7 python=3.5 python=3.6 python=3.8 pypy2.7 pypy3.5
 
 
 include makefile.bootstrapit.make
diff --git a/setup.cfg b/setup.cfg
index 2c04800..8d1258d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -160,3 +160,4 @@ disable =
     missing-module-docstring,
     missing-class-docstring,
     missing-function-docstring,
+    raise-missing-from,
diff --git a/src/pycalver/rewrite.py b/src/pycalver/rewrite.py
index abc1416..2a566c3 100644
--- a/src/pycalver/rewrite.py
+++ b/src/pycalver/rewrite.py
@@ -211,6 +211,7 @@ def diff(new_vinfo: version.VersionInfo, file_patterns: config.PatternsByGlob) -
         try:
             rfd = rfd_from_content(pattern_strs, new_vinfo, content)
         except NoPatternMatch:
+            # pylint:disable=raise-missing-from  ; we support py2, so not an option
             errmsg = f"No patterns matched for '{file_path}'"
             raise NoPatternMatch(errmsg)