diff --git a/tests/next_tests/integration_tests/multi_feature_tests/iterator_tests/test_fvm_nabla.py b/tests/next_tests/integration_tests/multi_feature_tests/iterator_tests/test_fvm_nabla.py
index 08962ba17d..ab22e2b360 100644
--- a/tests/next_tests/integration_tests/multi_feature_tests/iterator_tests/test_fvm_nabla.py
+++ b/tests/next_tests/integration_tests/multi_feature_tests/iterator_tests/test_fvm_nabla.py
@@ -163,8 +163,8 @@ def test_compute_zavgS(program_processor, lift_mode):
     )
 
     if validate:
-        assert_close(-199755464.25741270, min(zavgS))
-        assert_close(388241977.58389181, max(zavgS))
+        assert_close(-199755464.25741270, np.min(zavgS))
+        assert_close(388241977.58389181, np.max(zavgS))
 
     run_processor(
         compute_zavgS_fencil,
@@ -177,8 +177,8 @@ def test_compute_zavgS(program_processor, lift_mode):
         lift_mode=lift_mode,
     )
     if validate:
-        assert_close(-1000788897.3202186, min(zavgS))
-        assert_close(1000788897.3202186, max(zavgS))
+        assert_close(-1000788897.3202186, np.min(zavgS))
+        assert_close(1000788897.3202186, np.max(zavgS))
 
 
 @fendef
@@ -227,11 +227,11 @@ def test_compute_zavgS2(program_processor, lift_mode):
     )
 
     if validate:
-        assert_close(-199755464.25741270, min(zavgS[0]))
-        assert_close(388241977.58389181, max(zavgS[0]))
+        assert_close(-199755464.25741270, np.min(zavgS[0]))
+        assert_close(388241977.58389181, np.max(zavgS[0]))
 
-        assert_close(-1000788897.3202186, min(zavgS[1]))
-        assert_close(1000788897.3202186, max(zavgS[1]))
+        assert_close(-1000788897.3202186, np.min(zavgS[1]))
+        assert_close(1000788897.3202186, np.max(zavgS[1]))
 
 
 def test_nabla(program_processor, lift_mode):
@@ -272,10 +272,10 @@ def test_nabla(program_processor, lift_mode):
     )
 
     if validate:
-        assert_close(-3.5455427772566003e-003, min(pnabla_MXX))
-        assert_close(3.5455427772565435e-003, max(pnabla_MXX))
-        assert_close(-3.3540113705465301e-003, min(pnabla_MYY))
-        assert_close(3.3540113705465301e-003, max(pnabla_MYY))
+        assert_close(-3.5455427772566003e-003, np.min(pnabla_MXX))
+        assert_close(3.5455427772565435e-003, np.max(pnabla_MXX))
+        assert_close(-3.3540113705465301e-003, np.min(pnabla_MYY))
+        assert_close(3.3540113705465301e-003, np.max(pnabla_MYY))
 
 
 @fendef
@@ -329,10 +329,10 @@ def test_nabla2(program_processor, lift_mode):
     )
 
     if validate:
-        assert_close(-3.5455427772566003e-003, min(pnabla_MXX))
-        assert_close(3.5455427772565435e-003, max(pnabla_MXX))
-        assert_close(-3.3540113705465301e-003, min(pnabla_MYY))
-        assert_close(3.3540113705465301e-003, max(pnabla_MYY))
+        assert_close(-3.5455427772566003e-003, np.min(pnabla_MXX))
+        assert_close(3.5455427772565435e-003, np.max(pnabla_MXX))
+        assert_close(-3.3540113705465301e-003, np.min(pnabla_MYY))
+        assert_close(3.3540113705465301e-003, np.max(pnabla_MYY))
 
 
 @fundef
@@ -416,7 +416,7 @@ def test_nabla_sign(program_processor, lift_mode):
     )
 
     if validate:
-        assert_close(-3.5455427772566003e-003, min(pnabla_MXX))
-        assert_close(3.5455427772565435e-003, max(pnabla_MXX))
-        assert_close(-3.3540113705465301e-003, min(pnabla_MYY))
-        assert_close(3.3540113705465301e-003, max(pnabla_MYY))
+        assert_close(-3.5455427772566003e-003, np.min(pnabla_MXX))
+        assert_close(3.5455427772565435e-003, np.max(pnabla_MXX))
+        assert_close(-3.3540113705465301e-003, np.min(pnabla_MYY))
+        assert_close(3.3540113705465301e-003, np.max(pnabla_MYY))