diff --git a/model/common/src/icon4py/model/common/metrics/stencils/compute_wgtfacq_c.py b/model/common/src/icon4py/model/common/metrics/stencils/compute_wgtfacq_c.py
index 25bc3f2bba..4b2288c039 100644
--- a/model/common/src/icon4py/model/common/metrics/stencils/compute_wgtfacq_c.py
+++ b/model/common/src/icon4py/model/common/metrics/stencils/compute_wgtfacq_c.py
@@ -20,13 +20,13 @@ def compute_wgtfacq_c(
 ) -> np.array:
 
     nlev = nlevp1 - 1
-    wgtfacq_c = np.zeros(z_ifc.shape)
+    wgtfacq_c = np.zeros((z_ifc.shape[0], nlevp1))
     z1 = 0.5 * (z_ifc[:, nlev] - z_ifc[:, nlevp1])
     z2 = 0.5 * (z_ifc[:, nlev] + z_ifc[:, nlev - 1]) - z_ifc[:, nlevp1]
     z3 = 0.5 * (z_ifc[:, nlev - 1] + z_ifc[:, nlev - 2]) - z_ifc[:, nlevp1]
 
-    wgtfacq_c[:, 2] = z1 * z2 / (z2 - z3) / (z1 - z3)
-    wgtfacq_c[:, 1] = (z1 - wgtfacq_c[:, 2] * (z1 - z3)) / (z1 - z2)
-    wgtfacq_c[:, 0] = 1.0 - (wgtfacq_c[:, 1] + wgtfacq_c[:, 2])
+    wgtfacq_c[:, nlev - 2] = z1 * z2 / (z2 - z3) / (z1 - z3)
+    wgtfacq_c[:, nlev - 1] = (z1 - wgtfacq_c[:, nlev - 2] * (z1 - z3)) / (z1 - z2)
+    wgtfacq_c[:, nlev] = 1.0 - (wgtfacq_c[:, nlev - 1] + wgtfacq_c[:, nlev - 2])
 
     return wgtfacq_c
diff --git a/model/common/tests/metric_tests/test_compute_wgtfacq_c.py b/model/common/tests/metric_tests/test_compute_wgtfacq_c.py
index 1205c9baf9..d30c563796 100644
--- a/model/common/tests/metric_tests/test_compute_wgtfacq_c.py
+++ b/model/common/tests/metric_tests/test_compute_wgtfacq_c.py
@@ -25,7 +25,6 @@
 
 import pytest
 
-from icon4py.model.common.dimension import CellDim, KDim
 from icon4py.model.common.metrics.stencils.compute_wgtfacq_c import compute_wgtfacq_c
 from icon4py.model.common.test_utils.datatest_fixtures import (  # noqa: F401  # import fixtures from test_utils package
     data_provider,
@@ -39,27 +38,18 @@
     processor_props,
     ranked_data_path,
 )
-from icon4py.model.common.test_utils.helpers import dallclose, zero_field
-from icon4py.model.common.type_alias import wpfloat
+from icon4py.model.common.test_utils.helpers import dallclose
 
 
 @pytest.mark.datatest
 def test_compute_wgtfacq_c(icon_grid, metrics_savepoint):  # noqa: F811  # fixture
-    wgtfacq_c = zero_field(icon_grid, CellDim, KDim, dtype=wpfloat)
-    wgtfacq_c_ref = zero_field(icon_grid, CellDim, KDim, dtype=wpfloat, extend={KDim: 1})
     wgtfacq_c_dsl = metrics_savepoint.wgtfacq_c_dsl()
     z_ifc = metrics_savepoint.z_ifc()
 
-    # wgtfacq_c not serialized -> infer from wgtfacq_c_dsl
-    wgtfacq_c_ref = wgtfacq_c_ref.asnumpy()
-    wgtfacq_c_ref[:, 0] = wgtfacq_c_dsl.asnumpy()[:, -1]
-    wgtfacq_c_ref[:, 1] = wgtfacq_c_dsl.asnumpy()[:, -2]
-    wgtfacq_c_ref[:, 2] = wgtfacq_c_dsl.asnumpy()[:, -3]
-
     vertical_end = icon_grid.num_levels
 
     wgtfacq_c = compute_wgtfacq_c(
         z_ifc.asnumpy(),
         vertical_end,
     )
-    assert dallclose(wgtfacq_c, wgtfacq_c_ref)
+    assert dallclose(wgtfacq_c, wgtfacq_c_dsl.asnumpy())