diff --git a/tests/firedrake/regression/test_interp_dual.py b/tests/firedrake/regression/test_interp_dual.py
index e242951d74..73428e0cc6 100644
--- a/tests/firedrake/regression/test_interp_dual.py
+++ b/tests/firedrake/regression/test_interp_dual.py
@@ -38,7 +38,7 @@ def test_interp_self(V1):
     a = assemble(TestFunction(V1) * dx)
     b = assemble(TestFunction(V1) * dx)
     a.interpolate(a)
-    assert (a.dat.data_ro == b.dat.data_ro).all()
+    assert np.allclose(a.dat.data_ro, b.dat.data_ro)
 
 
 def test_assemble_interp_adjoint_tensor(mesh, V1, f1):