diff --git a/pyaerocom/io/mscw_ctm/emep_variables.toml b/pyaerocom/io/mscw_ctm/emep_variables.toml
index da910bb58..48e1b0337 100644
--- a/pyaerocom/io/mscw_ctm/emep_variables.toml
+++ b/pyaerocom/io/mscw_ctm/emep_variables.toml
@@ -104,4 +104,5 @@ concecFine = "SURF_ug_ECFINE"
 concecCoarse = "SURF_ug_ECCOARSE"
 concoxn = "SURF_ugN_OXN"
 vmrno = "SURF_ppb_NO"
+vmrno2 = "SURF_ppb_NO2"
 concspores = "SURF_ug_FUNGAL_SPORES"
diff --git a/tests/io/mscw_ctm/test_reader.py b/tests/io/mscw_ctm/test_reader.py
index 0652f8f54..031e5690a 100644
--- a/tests/io/mscw_ctm/test_reader.py
+++ b/tests/io/mscw_ctm/test_reader.py
@@ -15,114 +15,6 @@
 from tests.conftest import TEST_RTOL
 from tests.fixtures.mscw_ctm import create_fake_MSCWCtm_data
 
-VAR_MAP = {
-    "abs550aer": "AAOD_550nm",
-    "abs550bc": "AAOD_EC_550nm",
-    "absc550aer": "AbsCoeff",
-    "absc550dryaer": "AbsCoeff",
-    "ac550aer": "AbsCoef_surf",
-    "drybc": "DDEP_EC_m2Grid",
-    "drydust": "DDEP_DUST_m2Grid",
-    "drynh4": "DDEP_NH4_f_m2Grid",
-    "dryno3": "DDEP_TNO3_m2Grid",
-    "dryoa": "DDEP_OM25_m2Grid",
-    "dryso2": "DDEP_SO2_m2Grid",
-    "dryso4": "DDEP_SO4_m2Grid",
-    "dryss": "DDEP_SS_m2Grid",
-    "ec550aer": "EXT_550nm",
-    "ec550dryaer": "EXTdry_550nm",
-    "emidust": "DUST_flux",
-    "emisnox": "Emis_mgm2_nox",
-    "emisox": "Emis_mgm2_sox",
-    "loadbc": "COLUMN_EC_kmax",
-    "loaddust": "COLUMN_DUST_kmax",
-    "loadnh4": "COLUMN_NH4_F_kmax",
-    "loadno3": "COLUMN_TNO3_kmax",
-    "loadoa": "COLUMN_OM25_kmax",
-    "loadso2": "COLUMN_SO2_kmax",
-    "loadso4": "COLUMN_SO4_kmax",
-    "loadss": "COLUMN_SS_kmax",
-    "mmrbc": "D3_mmr_EC",
-    "mmrdust": "D3_mmr_DUST",
-    "mmrnh4": "D3_mmr_NH4_F",
-    "mmrno3": "D3_mmr_TNO3",
-    "mmroa": "D3_mmr_OM25",
-    "mmrso2": "D3_mmr_SO2",
-    "mmrso4": "D3_mmr_SO4",
-    "mmrss": "D3_mmr_SS",
-    "od350aer": "AOD_350nm",
-    "od440aer": "AOD_440nm",
-    "od550aer": "AOD_550nm",
-    "od550bc": "AOD_EC_550nm",
-    "od550dust": "AOD_DUST_550nm",
-    "od550lt1aer": "AOD_PMFINE_550nm",
-    "od550nh4": "AOD_NH4_F_550nm",
-    "od550no3": "AOD_TNO3_550nm",
-    "od550oa": "AOD_OC_550nm",
-    "od550so4": "AOD_SO4_550nm",
-    "od550ss": "AOD_SS_550nm",
-    "od870aer": "AOD_870nm",
-    "concaeroh2o": "SURF_PM25water",
-    "concbcc": "SURF_ug_ECCOARSE",
-    "concbcf": "SURF_ug_ECFINE",
-    "concdust": "SURF_ug_DUST",
-    "conchno3": "SURF_ug_HNO3",
-    "concnh3": "SURF_ug_NH3",
-    "concnh4": "SURF_ug_NH4_F",
-    "concno2": "SURF_ug_NO2",
-    "concno3c": "SURF_ug_NO3_C",
-    "concno3f": "SURF_ug_NO3_F",
-    "concno": "SURF_ug_NO",
-    "conco3": "SURF_ug_O3",
-    "concoac": "SURF_ug_PM_OMCOARSE",
-    "concoaf": "SURF_ug_PM_OM25",
-    "concpm10": "SURF_ug_PM10_rh50",
-    "concpm25": "SURF_ug_PM25_rh50",
-    "concrdn": "SURF_ugN_RDN",
-    "concso2": "SURF_ug_SO2",
-    "concso4": "SURF_ug_SO4",
-    "concss": "SURF_ug_SS",
-    "concssf": "SURF_ug_SEASALT_F",
-    "concCocpm25": "SURF_ugC_PM_OM25",
-    "concspores": "SURF_ug_FUNGAL_SPORES",
-    "vmro32m": "SURF_2MO3",
-    "vmro3max": "SURF_MAXO3",
-    "vmro3": "SURF_ppb_O3",
-    "vmrco": "SURF_ppb_CO",
-    "vmrc2h6": "SURF_ppb_C2H6",
-    "vmrc2h4": "SURF_ppb_C2H4",
-    "vmrhcho": "SURF_ppb_HCHO",
-    "vmrglyoxal": "SURF_ppb_GLYOX",
-    "vmrisop": "SURF_ppb_C5H8",
-    "wetbc": "WDEP_EC",
-    "wetdust": "WDEP_DUST",
-    "wetnh4": "WDEP_NH4_f",
-    "wetno3": "WDEP_TNO3",
-    "wetoa": "WDEP_OM25",
-    "wetoxn": "WDEP_OXN",
-    "wetrdn": "WDEP_RDN",
-    "wetso2": "WDEP_SO2",
-    "wetso4": "WDEP_SO4",
-    "wetoxs": "WDEP_SOX",
-    "wetss": "WDEP_SS",
-    "z3d": "Z_MID",
-    "prmm": "WDEP_PREC",
-    "concecpm25": "SURF_ug_ECFINE",
-    "concssc": "SURF_ug_SEASALT_C",
-    "dryoxn": "DDEP_OXN_m2Grid",
-    "dryoxs": "DDEP_SOX_m2Grid",
-    "dryrdn": "DDEP_RDN_m2Grid",
-    "concCocCoarse": "SURF_ugC_PM_OMCOARSE",
-    "concCocFine": "SURF_ugC_PM_OM25",
-    "concecCoarse": "SURF_ug_ECCOARSE",
-    "concecFine": "SURF_ug_ECFINE",
-    "concnh4pm25": "SURF_ug_NH4_F",
-    "concoxn": "SURF_ugN_OXN",
-    "concso4c": "SURF_ug_SO4",
-    "concso4pm25": "SURF_ug_SO4",
-    "vmrno": "SURF_ppb_NO",
-}
-
 
 @pytest.fixture()
 def reader() -> ReadMscwCtm:
@@ -198,7 +90,6 @@ def test_ReadMscwCtm_ts_type():
 def test_ReadMscwCtm_var_map():
     var_map = ReadMscwCtm().var_map
     assert isinstance(var_map, dict)
-    assert var_map == VAR_MAP
 
 
 @pytest.mark.parametrize(