diff --git a/model/common/src/icon4py/model/common/metrics/metrics_attributes.py b/model/common/src/icon4py/model/common/metrics/metrics_attributes.py
index 7509bf4646..600632f451 100644
--- a/model/common/src/icon4py/model/common/metrics/metrics_attributes.py
+++ b/model/common/src/icon4py/model/common/metrics/metrics_attributes.py
@@ -429,7 +429,7 @@
         units="",
         dims=(dims.CellDim, dims.KDim),
         icon_var_name="mask_hdiff",
-        dtype=ta.wpfloat,
+        dtype=bool,
     ),
     ZD_DIFFCOEF_DSL: dict(
         standard_name=ZD_DIFFCOEF_DSL,
diff --git a/model/common/tests/common/metrics/unit_tests/test_metrics_factory.py b/model/common/tests/common/metrics/unit_tests/test_metrics_factory.py
index fbc7903456..7a1befd7c8 100644
--- a/model/common/tests/common/metrics/unit_tests/test_metrics_factory.py
+++ b/model/common/tests/common/metrics/unit_tests/test_metrics_factory.py
@@ -490,7 +490,7 @@ def test_factory_mask_bdy_prog_halo_c(
     )
     field_1 = factory.get(attrs.MASK_PROG_HALO_C)
     field_2 = factory.get(attrs.BDY_HALO_C)
-    assert test_helpers.dallclose(field_ref_1.asnumpy(), field_1.asnumpy())
+    assert (field_ref_1.asnumpy() == field_1.asnumpy()).all()
     assert test_helpers.dallclose(field_ref_2.asnumpy(), field_2.asnumpy())
 
 
@@ -641,7 +641,7 @@ def test_factory_compute_diffusion_mask_and_coef(
     field_1 = factory.get(attrs.MASK_HDIFF)
     field_2 = factory.get(attrs.ZD_DIFFCOEF_DSL)
 
-    assert test_helpers.dallclose(field_ref_1.asnumpy(), field_1.asnumpy())
+    assert (field_ref_1.asnumpy() == field_1.asnumpy()).all()
     assert test_helpers.dallclose(field_ref_2.asnumpy(), field_2.asnumpy(), atol=1.0e-10)