diff --git a/.github/workflows/core.yml b/.github/workflows/core.yml
index 6f5a4ac336..ea16d44c43 100644
--- a/.github/workflows/core.yml
+++ b/.github/workflows/core.yml
@@ -210,6 +210,7 @@ jobs:
             --extra-index-url https://download.pytorch.org/whl/cpu \
             "$(echo ./firedrake-repo/dist/firedrake-*.tar.gz)[ci]"
 
+          pip install -I "firedrake-fiat @ git+https://github.com/firedrakeproject/fiat.git@pbrubeck/gem-tabulation"
           firedrake-clean
           pip list