diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e5004144..247c7569 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -70,6 +70,12 @@ jobs:
         python -m pip install numpy scipy cython
         python -m pip install 'git+https://github.com/qutip/qutip.git${{ matrix.qutip-version }}'
 
+    # For qutip-v5 qutip.control is replaced by qutip-qtrl
+    - name: Install qutip-qtrl from PyPI
+      if: ${{ matrix.qutip-version == '@master'}}
+      run: |
+        python -m pip install qutip-qtrl
+
     - name: Install Qiskit from PyPI
       if: ${{ matrix.qiskit-version != '' }}
       run: python -m pip install 'qiskit${{ matrix.qiskit-version }}'
diff --git a/src/qutip_qip/pulse.py b/src/qutip_qip/pulse.py
index e9e9ea7e..b25c9d02 100644
--- a/src/qutip_qip/pulse.py
+++ b/src/qutip_qip/pulse.py
@@ -652,7 +652,7 @@ def _fill_coeff(old_coeffs, old_tlist, full_tlist, args=None, tol=1.0e-10):
             old_coeffs = np.concatenate([old_coeffs, [0]])
         new_n = len(full_tlist)
         old_ind = 0  # index for old coeffs and tlist
-        new_coeff = np.zeros(new_n)
+        new_coeff = np.zeros(new_n, dtype=old_coeffs.dtype)
         for new_ind in range(new_n):
             t = full_tlist[new_ind]
             if old_tlist[0] - t > tol: