diff --git a/tests/ms2_filler/test_forest.py b/tests/ms2_filler/test_forest.py
index 77a80e3..6218266 100644
--- a/tests/ms2_filler/test_forest.py
+++ b/tests/ms2_filler/test_forest.py
@@ -61,13 +61,14 @@ def test_forest_ms2_structure(msfile):
             position = tb.getcell("POSITION", i)
             assert position.shape == (3,)
             assert np.allclose(position, np.array([-3871023.46, 3428106.87, 3724039.47]))
+            assert tb.getcell("FLAG_ROW", i) is False
 
     with open_table(os.path.join(msfile, "DATA_DESCRIPTION")) as tb:
         assert tb.nrows() == num_spws
         for i in range(num_spws):
             assert tb.getcell("SPECTRAL_WINDOW_ID", i) == i
             assert tb.getcell("POLARIZATION_ID", i) == 0
-            assert tb.getcell("FLAG_ROW", i) == False
+            assert tb.getcell("FLAG_ROW", i) is False
 
     with open_table(os.path.join(msfile, "STATE")) as tb:
         intents_map = dict((i, v) for i, v in enumerate(tb.getcol("OBS_MODE")))
diff --git a/tests/ms2_filler/test_h40.py b/tests/ms2_filler/test_h40.py
index 3e51171..e4ada3c 100644
--- a/tests/ms2_filler/test_h40.py
+++ b/tests/ms2_filler/test_h40.py
@@ -63,13 +63,14 @@ def test_h40_ms2_structure(msfile):
             position = tb.getcell("POSITION", i)
             assert position.shape == (3,)
             assert np.allclose(position, np.array([-3871023.46, 3428106.87, 3724039.47]))
+            assert tb.getcell("FLAG_ROW", i) is False
 
     with open_table(os.path.join(msfile, "DATA_DESCRIPTION")) as tb:
         assert tb.nrows() == num_spws
         for i in range(num_spws):
             assert tb.getcell("SPECTRAL_WINDOW_ID", i) == i
             assert tb.getcell("POLARIZATION_ID", i) == 0
-            assert tb.getcell("FLAG_ROW", i) == False
+            assert tb.getcell("FLAG_ROW", i) is False
 
     with open_table(os.path.join(msfile, "STATE")) as tb:
         intents_map = dict((i, v) for i, v in enumerate(tb.getcol("OBS_MODE")))
diff --git a/tests/ms2_filler/test_z45.py b/tests/ms2_filler/test_z45.py
index e608253..6f15e8d 100644
--- a/tests/ms2_filler/test_z45.py
+++ b/tests/ms2_filler/test_z45.py
@@ -62,13 +62,14 @@ def test_z45_ms2_structure(msfile):
             position = tb.getcell("POSITION", i)
             assert position.shape == (3,)
             assert np.allclose(position, np.array([-3871023.46, 3428106.87, 3724039.47]))
+            assert tb.getcell("FLAG_ROW", i) is False
 
     with open_table(os.path.join(msfile, "DATA_DESCRIPTION")) as tb:
         assert tb.nrows() == num_spws
         for i in range(num_spws):
             assert tb.getcell("SPECTRAL_WINDOW_ID", i) == i
             assert tb.getcell("POLARIZATION_ID", i) == 0
-            assert tb.getcell("FLAG_ROW", i) == False
+            assert tb.getcell("FLAG_ROW", i) is False
 
     with open_table(os.path.join(msfile, "STATE")) as tb:
         intents_map = dict((i, v) for i, v in enumerate(tb.getcol("OBS_MODE")))