diff --git a/test_problems/cathermo/testIAPWS/output_blessed.txt b/test_problems/cathermo/testIAPWS/output_blessed.txt
index 4e267c032..283661388 100644
--- a/test_problems/cathermo/testIAPWS/output_blessed.txt
+++ b/test_problems/cathermo/testIAPWS/output_blessed.txt
@@ -1,14 +1,14 @@
  T = 500 K, rho = 838.025 kg m-3
-nau    =  2.0479773347960e+00		res    = -3.4269320568156e+00
-nau_d  =  3.8423674711375e-01		res_d  = -3.6436665036388e-01
-nau_dd = -1.4763787783256e-01		res_dd =  8.5606370097461e-01
-nau_t  =   9.046111061752e+00		res_t  = -5.8140343523842e+00
-nau_tt = -1.9324918501305e+00		res_tt = -2.2344073688434e+00
-nau_dt =  0.0000000000000e+00		res_dt = -1.1217691467031e+00
+nau    =   2.047977334796e+00		res    =  -3.426932056816e+00
+nau_d  =   3.842367471137e-01		res_d  =  -3.643666503639e-01
+nau_dd =  -1.476378778326e-01		res_dd =   8.560637009746e-01
+nau_t  =   9.046111061752e+00		res_t  =  -5.814034352384e+00
+nau_tt =  -1.932491850131e+00		res_tt =  -2.234407368843e+00
+nau_dt =   0.000000000000e+00		res_dt =  -1.121769146703e+00
  T = 647 K, rho = 358.0 kg m-3
-nau    = -1.5631960505252e+00		res    = -1.2120265650415e+00
-nau_d  =  8.9944134078212e-01		res_d  = -7.1401202437128e-01
-nau_dd = -8.0899472550794e-01		res_dd =  4.7573069564569e-01
-nau_t  =   9.803439179390e+00		res_t  = -3.2172250077517e+00
-nau_tt = -3.4331633414307e+00		res_tt = -9.9602950655930e+00
-nau_dt =  0.0000000000000e+00		res_dt = -1.3321472043614e+00
+nau    =  -1.563196050525e+00		res    =  -1.212026565041e+00
+nau_d  =   8.994413407821e-01		res_d  =  -7.140120243713e-01
+nau_dd =  -8.089947255079e-01		res_dd =   4.757306956457e-01
+nau_t  =   9.803439179390e+00		res_t  =  -3.217225007752e+00
+nau_tt =  -3.433163341431e+00		res_tt =  -9.960295065593e+00
+nau_dt =   0.000000000000e+00		res_dt =  -1.332147204361e+00