diff --git a/.github/workflows/cron-staging.yml b/.github/workflows/cron-staging.yml
index ac44e4d015..0f9c667bc3 100644
--- a/.github/workflows/cron-staging.yml
+++ b/.github/workflows/cron-staging.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         python-version: [3.8, "3.12"]
-        os: ["ubuntu-latest", "macOS-latest", "windows-latest"]
+        os: ["ubuntu-latest", "macos-latest", "windows-latest"]
     steps:
       - name: Print Concurrency Group
         env:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3b3edf9566..0e660d004b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         python-version: [3.8, "3.12"]
-        os: ["ubuntu-latest", "macOS-latest", "windows-latest"]
+        os: ["ubuntu-latest", "macos-latest", "windows-latest"]
     steps:
       - name: Print Concurrency Group
         env:
@@ -88,10 +88,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Temporary workaround for GitVersion
-        shell: bash
-        run: |
-          git config --unset-all extensions.worktreeconfig
       - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
diff --git a/qiskit_experiments/library/quantum_volume/qv_experiment.py b/qiskit_experiments/library/quantum_volume/qv_experiment.py
index 49e2f6c02b..5d64b37377 100644
--- a/qiskit_experiments/library/quantum_volume/qv_experiment.py
+++ b/qiskit_experiments/library/quantum_volume/qv_experiment.py
@@ -97,9 +97,9 @@ def __init__(
         self.set_experiment_options(trials=trials, seed=seed)
 
         if not simulation_backend and HAS_AER:
-            from qiskit_aer import Aer
+            from qiskit_aer import AerSimulator
 
-            self._simulation_backend = Aer.get_backend("aer_simulator")
+            self._simulation_backend = AerSimulator()
         else:
             self._simulation_backend = simulation_backend