diff --git a/src/Backends/Helmholtz/HelmholtzEOSMixtureBackend.cpp b/src/Backends/Helmholtz/HelmholtzEOSMixtureBackend.cpp
index 837354c7..c3b90c89 100644
--- a/src/Backends/Helmholtz/HelmholtzEOSMixtureBackend.cpp
+++ b/src/Backends/Helmholtz/HelmholtzEOSMixtureBackend.cpp
@@ -1368,14 +1368,14 @@ void HelmholtzEOSMixtureBackend::T_phase_determination_pure_or_pseudopure(int ot
 
         if (other == iP)
         {
-            if (value > HEOS.SatL->p()*(1e-10 + 1)){
+            if (value > HEOS.SatL->p()*(1e-8 + 1)){
                 this->_phase = iphase_liquid; _Q = -1000; return;
             }
-            else if (value < HEOS.SatV->p()*(1 - 1e-10)){
+            else if (value < HEOS.SatV->p()*(1 - 1e-8)){
                 this->_phase = iphase_gas; _Q = 1000; return;
             }
             else{
-                throw ValueError(format("Saturation pressure [%g Pa] corresponding to T [%g K] is within 1e-8 %% of given p [%Lg Pa]", HEOS.SatL->p(), _T, value));
+                throw ValueError(format("Saturation pressure [%g Pa] corresponding to T [%g K] is within 1e-6 %% of given p [%Lg Pa]", HEOS.SatL->p(), _T, value));
             }
         }
 
diff --git a/src/Tests/CoolProp-Tests.cpp b/src/Tests/CoolProp-Tests.cpp
index 6accd0cc..1c36dfe0 100644
--- a/src/Tests/CoolProp-Tests.cpp
+++ b/src/Tests/CoolProp-Tests.cpp
@@ -704,7 +704,7 @@ TEST_CASE("Tests for solvers in P,T flash using Water", "[flash],[PT]")
     }
     SECTION("Subcritical p slightly subcooled should be ok")
     {
-        double Ts, ps, rho, dT = 1e-8;
+        double Ts, ps, rho, dT = 1e-4;
         CHECK_NOTHROW(Ts = PropsSI("T","P",101325,"Q",0,"Water"));
         CAPTURE(Ts);
         CHECK(ValidNumber(Ts));
@@ -715,7 +715,7 @@ TEST_CASE("Tests for solvers in P,T flash using Water", "[flash],[PT]")
     }
     SECTION("Subcritical p slightly superheated should be ok")
     {
-        double Ts, ps, rho, dT = 1e-8;
+        double Ts, ps, rho, dT = 1e-4;
         CHECK_NOTHROW(Ts = PropsSI("T","P",101325,"Q",0,"Water"));
         CAPTURE(Ts);
         CHECK(ValidNumber(Ts));
@@ -755,7 +755,7 @@ TEST_CASE("Tests for solvers in P,Y flash using Water", "[flash],[PH],[PS],[PU]"
         ss2 << "Subcritical barely superheated P," << ykey;
         SECTION(ss2.str(), "")
         {
-            double dT = 1e-6;
+            double dT = 1e-3;
             CHECK_NOTHROW(Ts=PropsSI("T","P",101325,"Q",0,"Water"));
             CHECK(ValidNumber(Ts));
             CAPTURE(Ts);
@@ -789,7 +789,7 @@ TEST_CASE("Tests for solvers in P,Y flash using Water", "[flash],[PH],[PS],[PU]"
         ss4 << "Subcritical barely subcooled P," << ykey;
         SECTION(ss4.str(), "")
         {
-            double dT = -1e-6;
+            double dT = -1e-3;
             CHECK_NOTHROW(Ts=PropsSI("T","P",101325,"Q",0,"Water"));
             CHECK(ValidNumber(Ts));
             CAPTURE(Ts);