diff --git a/test/unit/tools/test_optools.py b/test/unit/tools/test_optools.py
index a94a4c280..17c7641a9 100644
--- a/test/unit/tools/test_optools.py
+++ b/test/unit/tools/test_optools.py
@@ -429,7 +429,7 @@ def test_diamond_norm_epigraph(self):
         obj_expr, constraints = sdps.diamond_norm_canon(delta1, 'std')
         objective = cp.Minimize(obj_expr)
         problem = cp.Problem(objective, constraints)
-        val1 = problem.solve(verbose=True, solver='MOSEK')
+        val1 = problem.solve(verbose=True, solver='CLARABEL')
         self.assertGreaterEqual(val0, 0.7)
         self.assertAlmostEqual(val0, val1, places=4)
         return