diff --git a/.github/workflows/TestCITools.yml b/.github/workflows/TestCITools.yml
index 443429d..01f3958 100644
--- a/.github/workflows/TestCITools.yml
+++ b/.github/workflows/TestCITools.yml
@@ -35,6 +35,7 @@ jobs:
       override_ci_tools_repository: ${{ github.repository }}
       ci_tools_version: ${{ github.sha }}
       extra_toolchains: 'parser_tools;fortran;omp;go;python3'
+      exclude_archs: 'wasm_mvp;wasm_eh;wasm_threads' # TODO: remove once fixed upstream
 
   extension-template-rust:
     name: Extension template (Rust)
@@ -47,6 +48,7 @@ jobs:
       override_ci_tools_repository: ${{ github.repository }}
       ci_tools_version: ${{ github.sha }}
       extra_toolchains: 'parser_tools;fortran;omp;go;rust;python3'
+      exclude_archs: 'windows_amd64_rtools;windows_amd64_mingw' # TODO: remove once fixed upstream
 
   delta-extension-main:
     name: Rust builds (using Delta extension)