Index: .github/workflows/build.yml
===================================================================
diff -u -r72fcc443795dbc7383276e587ddc4606b6875c52 -r24542a2eef5724b7594c96a1f95d0402b8629083
--- .github/workflows/build.yml	(.../build.yml)	(revision 72fcc443795dbc7383276e587ddc4606b6875c52)
+++ .github/workflows/build.yml	(.../build.yml)	(revision 24542a2eef5724b7594c96a1f95d0402b8629083)
@@ -63,10 +63,6 @@
             experimental: [true]
           - os: macos-latest
             compiler: gcc-12
-            tcltag: core-8-5-19
-            experimental: [false]
-          - os: macos-latest
-            compiler: gcc-12
             tcltag: core-8-6-15
             experimental: [false]
           - os: macos-latest
@@ -75,10 +71,6 @@
             experimental: [false]
           - os: ubuntu-latest
             compiler: gcc-10
-            tcltag: core-8-5-19
-            experimental: [false]
-          - os: ubuntu-latest
-            compiler: gcc-10
             tcltag: core-8-6-15
             experimental: [false]
           - os: ubuntu-latest
Index: appveyor.yml
===================================================================
diff -u -rd9682859a7044a4837a6cd6a37f90847df2d9b69 -r24542a2eef5724b7594c96a1f95d0402b8629083
--- appveyor.yml	(.../appveyor.yml)	(revision d9682859a7044a4837a6cd6a37f90847df2d9b69)
+++ appveyor.yml	(.../appveyor.yml)	(revision 24542a2eef5724b7594c96a1f95d0402b8629083)
@@ -29,10 +29,6 @@
     TOOLCHAIN: autoconf-tea
   #  - TCLTAG: core-8-5-branch
   #    TOOLCHAIN: nmake-tea
-  - TCLTAG: core-8-5-19
-    TOOLCHAIN: autoconf-tea
-  #  - TCLTAG: core-8-5-19
-  #    TOOLCHAIN: nmake-tea	
   - TCLTAG: core-9-0-0
     TOOLCHAIN: autoconf-tea
   - TCLTAG: core-9-0-0
Index: doc/Announce2.4.1
===================================================================
diff -u -rdeebac4d148d6e1cca2aa6b3ea33ff28359f518d -r24542a2eef5724b7594c96a1f95d0402b8629083
--- doc/Announce2.4.1	(.../Announce2.4.1)	(revision deebac4d148d6e1cca2aa6b3ea33ff28359f518d)
+++ doc/Announce2.4.1	(.../Announce2.4.1)	(revision 24542a2eef5724b7594c96a1f95d0402b8629083)
@@ -17,6 +17,9 @@
     https://github.com/nm-wu/nsf/actions
     https://ci.appveyor.com/project/mrcalvin/nsf-2ylk0/history
 
+Hint: As for Tcl 8.5, NSF is only tested with (unreleased) Tcl 8.5
+revisions taken from `core-8-5-branch` at https://core.tcl-lang.org/tcl/.
+
 Selected changes worth mentioning:
 
 - Maintenance & bug fixes: