diff --git a/metadata.yaml b/metadata.yaml
index 09aa48e..7beef05 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -24,7 +24,7 @@ keywords:
   - JRA55
   - interannual
   - access-om2-01
-version: null
+version: "2.0"
 realm:
   - ocean
   - seaIce
diff --git a/testing/checksum/historical-3hr-checksum.json b/testing/checksum/historical-3hr-checksum.json
new file mode 100644
index 0000000..29ecb25
--- /dev/null
+++ b/testing/checksum/historical-3hr-checksum.json
@@ -0,0 +1,339 @@
+{
+  "schema_version": "1-0-0",
+  "output": {
+    "xt": [
+      "-8034147111494819151"
+    ],
+    "xu": [
+      "1181928651118804837"
+    ],
+    "yt": [
+      "8201450824554186114"
+    ],
+    "yu": [
+      "8207976630208734077"
+    ],
+    "dxt": [
+      "-3705614679736144149"
+    ],
+    "dxu": [
+      "-3702264151164812765"
+    ],
+    "dyt": [
+      "-2742960789918998709"
+    ],
+    "dyu": [
+      "-2740063750834574862"
+    ],
+    "dat": [
+      "5092331269373388838"
+    ],
+    "dau": [
+      "5098525894210749656"
+    ],
+    "dxtn": [
+      "-3702418682898777446"
+    ],
+    "dytn": [
+      "-2739938610493522510"
+    ],
+    "dxte": [
+      "-3705461952009937526"
+    ],
+    "dyte": [
+      "-2743086076374193657"
+    ],
+    "dxun": [
+      "-3699071737375098495"
+    ],
+    "dyun": [
+      "-2737017152527893107"
+    ],
+    "dxue": [
+      "-3702110994572392515"
+    ],
+    "dyue": [
+      "-2740195414294629316"
+    ],
+    "dtn+dts": [
+      "-2742960789918998709"
+    ],
+    "dun+dus": [
+      "-2740063750834574862"
+    ],
+    "dte+dtw": [
+      "-3705614679736144149"
+    ],
+    "due+duw": [
+      "-3702264151164812765"
+    ],
+    "dte": [
+      "-4885481042972946538"
+    ],
+    "dtw": [
+      "-4885634831786780675"
+    ],
+    "due": [
+      "-4882131202881836232"
+    ],
+    "duw": [
+      "-4882284672318520472"
+    ],
+    "sin_rot": [
+      "-2708234264262665098"
+    ],
+    "cos_rot": [
+      "5911012626299441831"
+    ],
+    "ht": [
+      "-6115399843444686848"
+    ],
+    "hu": [
+      "-3150563670392569856"
+    ],
+    "htr": [
+      "-1383399679723272254"
+    ],
+    "kmu": [
+      "212348"
+    ],
+    "kmt": [
+      "215089"
+    ],
+    "Zonal velocity": [
+      "-7041711812585786936",
+      "6827696125224651764"
+    ],
+    "Meridional velocity": [
+      "-7041711812585786936",
+      "-2015881717187427893"
+    ],
+    "Advection of u": [
+      "0",
+      "-6030637310235604706"
+    ],
+    "Advection of v": [
+      "0",
+      "-185742899745698524"
+    ],
+    "rho(taup1)": [
+      "-4870574186649091102",
+      "4196049486174998091"
+    ],
+    "pressure_at_depth": [
+      "1166850967010087432",
+      "-8094756630547342305"
+    ],
+    "denominator_r": [
+      "-8577873584889190525",
+      "-5114652064464666028"
+    ],
+    "drhodT": [
+      "0",
+      "-1018066369609856155"
+    ],
+    "drhodS": [
+      "0",
+      "1409226365063228960"
+    ],
+    "drhodz_zt": [
+      "-5564988440240921457",
+      "667895960666276144"
+    ],
+    "temp": [
+      "2012956832363876583"
+    ],
+    "salt": [
+      "-6199328179223031808"
+    ],
+    "age_global": [
+      "-3012559306835433806"
+    ],
+    "pot_temp": [
+      "-5844855379287172632"
+    ],
+    "frazil": [
+      "-7376446845324287717"
+    ],
+    "ending bih_viscosity": [
+      "-6883842654311872118"
+    ],
+    "eta_t": [
+      "-8880247787235429980"
+    ],
+    "eta_u": [
+      "-6423898340638421351"
+    ],
+    "deta_dt": [
+      "8621933274870720187"
+    ],
+    "eta_t_bar": [
+      "2448827562614526943"
+    ],
+    "pbot_t": [
+      "4094002110405051708"
+    ],
+    "pbot_u": [
+      "7579523562263384935"
+    ],
+    "dpbot_dt": [
+      "0"
+    ],
+    "anompb": [
+      "7135124254037105776"
+    ],
+    "anompb_bar": [
+      "0"
+    ],
+    "patm_t": [
+      "0"
+    ],
+    "dpatm_dt": [
+      "0"
+    ],
+    "ps": [
+      "3544131118026999512"
+    ],
+    "grad_ps_1": [
+      "-1131444633336875982"
+    ],
+    "grad_ps_2": [
+      "5405865035096511711"
+    ],
+    "grad_anompb_1": [
+      "0"
+    ],
+    "grad_anompb_2": [
+      "0"
+    ],
+    "udrho": [
+      "-120869054089417423"
+    ],
+    "vdrho": [
+      "4295395860269501033"
+    ],
+    "conv_rho_ud_t": [
+      "-4636260355079558862"
+    ],
+    "source": [
+      "-2490895151513198494"
+    ],
+    "eta smoother": [
+      "-2490895151513198494"
+    ],
+    "pbot smoother": [
+      "0"
+    ],
+    "eta_nonbouss": [
+      "-3909177206647941254"
+    ],
+    "forcing_u_bt": [
+      "3778113873852941758"
+    ],
+    "forcing_v_bt": [
+      "8753527312505484173"
+    ],
+    "Thickness%rho_dzt(taup1)": [
+      "-6158638367159175018"
+    ],
+    "Thickness%rho_dzu(taup1)": [
+      "-20274190879418989"
+    ],
+    "Thickness%mass_u(taup1)": [
+      "-7409693107027317456"
+    ],
+    "Thickness%rho_dzten(1)": [
+      "1889846198171387320"
+    ],
+    "Thickness%rho_dzten(2)": [
+      "4602134097123408758"
+    ],
+    "Thickness%rho_dztr": [
+      "-9195934179368444144"
+    ],
+    "Thickness%rho_dzur": [
+      "5336092687421654010"
+    ],
+    "Thickness%rho_dzt_tendency": [
+      "9204702115326724140"
+    ],
+    "Thickness%dzt": [
+      "-2949945077572729267"
+    ],
+    "Thickness%dzten(1)": [
+      "6893098008364569319"
+    ],
+    "Thickness%dzten(2)": [
+      "-8889086696537590410"
+    ],
+    "Thickness%dztlo": [
+      "-8768331654639173838"
+    ],
+    "Thickness%dztup": [
+      "-8840917840356356324"
+    ],
+    "Thickness%dzt_dst": [
+      "-446612494965599123"
+    ],
+    "Thickness%dzwt(k=0)": [
+      "-7892237458583830276"
+    ],
+    "Thickness%dzwt(k=1:nk)": [
+      "987158147498255044"
+    ],
+    "Thickness%dzu": [
+      "468807661367685448"
+    ],
+    "Thickness%dzwu(k=0)": [
+      "7991260398710831347"
+    ],
+    "Thickness%dzwu(k=1:nk)": [
+      "3322791242666882708"
+    ],
+    "Thickness%depth_zt": [
+      "-2033043237935273486"
+    ],
+    "Thickness%geodepth_zt": [
+      "8795879425777356928"
+    ],
+    "Thickness%depth_zu": [
+      "3063832067587426167"
+    ],
+    "Thickness%depth_zwt": [
+      "-2281127648346647995"
+    ],
+    "Thickness%depth_zwu": [
+      "-7788005483518300569"
+    ],
+    "Thickness%depth_st": [
+      "-1759098274750011954"
+    ],
+    "Thickness%depth_swt": [
+      "-3279862611256016896"
+    ],
+    "Thickness%dst": [
+      "-561797207821385728"
+    ],
+    "Thickness%dstlo": [
+      "-6380092873483100976"
+    ],
+    "Thickness%dstup": [
+      "-6452889649401759616"
+    ],
+    "Thickness%dswt(k=0)": [
+      "-4040621995610603520"
+    ],
+    "Thickness%dswt(k=1:nk)": [
+      "462104465433539992"
+    ],
+    "Thickness%pbot0": [
+      "-8921843325764352856"
+    ],
+    "Thickness%mass_en(1)": [
+      "-6447840589883442827"
+    ],
+    "Thickness%mass_en(2)": [
+      "-5100448633121009369"
+    ]
+  }
+}
\ No newline at end of file