Index: .github/workflows/build.yml
===================================================================
diff -u -r3bd2a94ec9bf20b065bdc5e46d46c763a34bfa61 -r621d7ad1c7ee36f9fb8400cb21e5441da3d016de
--- .github/workflows/build.yml	(.../build.yml)	(revision 3bd2a94ec9bf20b065bdc5e46d46c763a34bfa61)
+++ .github/workflows/build.yml	(.../build.yml)	(revision 621d7ad1c7ee36f9fb8400cb21e5441da3d016de)
@@ -71,7 +71,7 @@
             experimental: [false]
           - os: macos-latest
             compiler: gcc-11
-            tcltag: core-9-0-b2
+            tcltag: core-9-0-b3
             experimental: [false]
           - os: ubuntu-latest
             compiler: gcc-10
@@ -83,7 +83,7 @@
             experimental: [false]
           - os: ubuntu-latest
             compiler: gcc-10
-            tcltag: core-9-0-b2
+            tcltag: core-9-0-b3
             experimental: [false]
     defaults:
       run:
Index: appveyor.yml
===================================================================
diff -u -r3702c134b7bde17edfae2629739557a946c0a919 -r621d7ad1c7ee36f9fb8400cb21e5441da3d016de
--- appveyor.yml	(.../appveyor.yml)	(revision 3702c134b7bde17edfae2629739557a946c0a919)
+++ appveyor.yml	(.../appveyor.yml)	(revision 621d7ad1c7ee36f9fb8400cb21e5441da3d016de)
@@ -33,9 +33,9 @@
     TOOLCHAIN: autoconf-tea
   #  - TCLTAG: core-8-5-19
   #    TOOLCHAIN: nmake-tea	
-  - TCLTAG: core-9-0-b2
+  - TCLTAG: core-9-0-b3
     TOOLCHAIN: autoconf-tea
-  - TCLTAG: core-9-0-b2
+  - TCLTAG: core-9-0-b3
     TOOLCHAIN: nmake-tea
   - TCLTAG: core-8-branch
     TOOLCHAIN: autoconf-tea
@@ -50,7 +50,7 @@
   - TCLTAG: core-8-6-branch
   - TCLTAG: core-8-5-branch
   - TCLTAG: core-8-branch
-  - TCLTAG: core-9-0-b2
+  - TCLTAG: core-9-0-b3
   - TCLTAG: main
   fast_finish: true