diff --git a/.github/workflows/maincheck.yml b/.github/workflows/maincheck.yml
index f84e9a9ac..8a18da840 100644
--- a/.github/workflows/maincheck.yml
+++ b/.github/workflows/maincheck.yml
@@ -14,7 +14,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                python-version: ["3.10", "3.11", "3.12"]  # "3.10" must be in quotes to not have it eval to 3.1
+                python-version: ["3.10", "3.11", "3.12", "3.13"]  # "3.10" must be in quotes to not have it eval to 3.1
         steps:
         - uses: actions/setup-python@v4
           with:
@@ -27,8 +27,8 @@ jobs:
         - name: Run Main Test script
           run: python -c 'from music21.test.testSingleCoreAll import ciMain as ci; ci()'
         - name: Coveralls
-          if: ${{ matrix.python-version == '3.11' }}
-          env:
+          if: ${{ matrix.python-version == '3.12' }}
+          env:  # when changing number above also change coverageM21.getCoverage
               GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
               COVERALLS_SERVICE_NAME: github
           run: coveralls
diff --git a/music21/common/weakrefTools.py b/music21/common/weakrefTools.py
index 8d961720e..478a5823f 100644
--- a/music21/common/weakrefTools.py
+++ b/music21/common/weakrefTools.py
@@ -31,10 +31,10 @@ def wrapWeakref(referent: _T) -> weakref.ReferenceType|_T:
     >>> a1 = Mock()
     >>> ref1 = common.wrapWeakref(a1)
     >>> ref1
-    <weakref at 0x101f29ae8; to 'Mock' at 0x101e45358>
+    <weakref at 0x101f29ae8; to ...Mock' at 0x101e45358>
     >>> ref2 = common.wrapWeakref(ref1)
     >>> ref2
-    <weakref at 0x101f299af; to 'Mock' at 0x101e45358>
+    <weakref at 0x101f299af; to ...Mock' at 0x101e45358>
     >>> ref3 = common.wrapWeakref(5)
     >>> ref3
     5
diff --git a/music21/sites.py b/music21/sites.py
index 3d2ca2164..59f5758d6 100644
--- a/music21/sites.py
+++ b/music21/sites.py
@@ -76,7 +76,7 @@ class SiteRef(common.SlottedObjectMixin, prebase.ProtoM21Object):
     >>> s.site
     <music21.stream.Stream hi>
     >>> s.siteWeakref
-    <weakref at 0x123456; to 'Stream' at 0x111111>
+    <weakref at 0x123456; to ...Stream' at 0x111111>
 
 
     If you turn sites.WEAKREF_ACTIVE to False then .siteWeakref just stores another reference to
diff --git a/music21/test/coverageM21.py b/music21/test/coverageM21.py
index 3c8f2b5b9..9bf178fd1 100644
--- a/music21/test/coverageM21.py
+++ b/music21/test/coverageM21.py
@@ -40,12 +40,12 @@ def getCoverage(overrideVersion=False):
     # (The odds of a failure on the middle version are low if
     # the newest and oldest are passing)
     #
-    # Note the .minor == 11 -- that makes it only run on 3.11
+    # Note the .minor == 12 -- that makes it only run on 3.12
     #
     # When changing the version, be sure also to change
     # .github/maincheck.yml's line:
-    #           if: ${{ matrix.python-version == '3.11' }}
-    if overrideVersion or sys.version_info.minor == 11:
+    #           if: ${{ matrix.python-version == '3.12' }}
+    if overrideVersion or sys.version_info.minor == 12:
         try:
             # noinspection PyPackageRequirements
             import coverage  # type: ignore