Index: .github/workflows/build.yml
===================================================================
diff -u -r621d7ad1c7ee36f9fb8400cb21e5441da3d016de -rd9682859a7044a4837a6cd6a37f90847df2d9b69
--- .github/workflows/build.yml	(.../build.yml)	(revision 621d7ad1c7ee36f9fb8400cb21e5441da3d016de)
+++ .github/workflows/build.yml	(.../build.yml)	(revision d9682859a7044a4837a6cd6a37f90847df2d9b69)
@@ -67,23 +67,23 @@
             experimental: [false]
           - os: macos-latest
             compiler: gcc-11
-            tcltag: core-8-6-14
+            tcltag: core-8-6-15
             experimental: [false]
           - os: macos-latest
             compiler: gcc-11
-            tcltag: core-9-0-b3
+            tcltag: core-9-0-0
             experimental: [false]
           - os: ubuntu-latest
             compiler: gcc-10
             tcltag: core-8-5-19
             experimental: [false]
           - os: ubuntu-latest
             compiler: gcc-10
-            tcltag: core-8-6-14
+            tcltag: core-8-6-15
             experimental: [false]
           - os: ubuntu-latest
             compiler: gcc-10
-            tcltag: core-9-0-b3
+            tcltag: core-9-0-0
             experimental: [false]
     defaults:
       run:
Index: appveyor.yml
===================================================================
diff -u -r621d7ad1c7ee36f9fb8400cb21e5441da3d016de -rd9682859a7044a4837a6cd6a37f90847df2d9b69
--- appveyor.yml	(.../appveyor.yml)	(revision 621d7ad1c7ee36f9fb8400cb21e5441da3d016de)
+++ appveyor.yml	(.../appveyor.yml)	(revision d9682859a7044a4837a6cd6a37f90847df2d9b69)
@@ -21,9 +21,9 @@
     TOOLCHAIN: autoconf-tea
   - TCLTAG: core-8-6-branch
     TOOLCHAIN: nmake-tea
-  - TCLTAG: core-8-6-14
+  - TCLTAG: core-8-6-15
     TOOLCHAIN: autoconf-tea
-  - TCLTAG: core-8-6-14
+  - TCLTAG: core-8-6-15
     TOOLCHAIN: nmake-tea
   - TCLTAG: core-8-5-branch
     TOOLCHAIN: autoconf-tea
@@ -33,9 +33,9 @@
     TOOLCHAIN: autoconf-tea
   #  - TCLTAG: core-8-5-19
   #    TOOLCHAIN: nmake-tea	
-  - TCLTAG: core-9-0-b3
+  - TCLTAG: core-9-0-0
     TOOLCHAIN: autoconf-tea
-  - TCLTAG: core-9-0-b3
+  - TCLTAG: core-9-0-0
     TOOLCHAIN: nmake-tea
   - TCLTAG: core-8-branch
     TOOLCHAIN: autoconf-tea