diff --git a/.github/workflows/neko.yml b/.github/workflows/neko.yml
index bda60fd39790..30921c8b051b 100644
--- a/.github/workflows/neko.yml
+++ b/.github/workflows/neko.yml
@@ -16,4 +16,6 @@ jobs:
       - uses: Qiskit/qiskit-neko@main
         with:
           test_selection: terra
-          repo_install_command: "pip install -c constraints.txt ."
+          # We have to forcibly uninstall any old version of qiskit or qiskit-terra during the
+          # changeover, because it's not possible to safely upgrade an existing installation to 1.0.
+          repo_install_command: "pip uninstall qiskit qiskit-terra && pip install -c constraints.txt ."