diff --git a/rtest b/rtest
index f4301bda69b..a057e636a8a 100755
--- a/rtest
+++ b/rtest
@@ -4,9 +4,9 @@ use File::Temp qw/ tempfile /;
 
 #delete($ENV{'OPENMODELICALIBRARY'});
 if (defined $ENV{"RTEST_OMCFLAGS"}) {
-    $omcflags=$ENV{"RTEST_OMCFLAGS"};
+    $omcflags=$ENV{"RTEST_OMCFLAGS"} . " --alarm=900";
 } else {
-    $omcflags="";
+    $omcflags="--alarm=900";
 }
 
 (undef,$testTempFile) = tempfile("rtest$$.XXXXX", TMPDIR => 1, SUFFIX => ".tmp", UNLINK => 1);
diff --git a/simulation/modelica/hpcom/Modelica.Fluid.Examples.BranchingDynamicPipes.mos b/simulation/modelica/hpcom/Modelica.Fluid.Examples.BranchingDynamicPipes.mos
index 89112f6f126..f009d35d270 100644
--- a/simulation/modelica/hpcom/Modelica.Fluid.Examples.BranchingDynamicPipes.mos
+++ b/simulation/modelica/hpcom/Modelica.Fluid.Examples.BranchingDynamicPipes.mos
@@ -100,7 +100,7 @@ res := OpenModelica.Scripting.compareSimulationResults("Modelica.Fluid.Examples.
    "pipe4.flowModel.m_flows[5]"});
 
 // Result:
-// 0
+// 900
 // true
 // true
 // ""
diff --git a/simulation/modelica/nonlinear_system/problem2_symjac.mos b/simulation/modelica/nonlinear_system/problem2_symjac.mos
index 685b73781d1..63654a2a1e6 100644
--- a/simulation/modelica/nonlinear_system/problem2_symjac.mos
+++ b/simulation/modelica/nonlinear_system/problem2_symjac.mos
@@ -21,7 +21,7 @@ val(x[10],{0.0,1.0,2.0});
 val(y,{0.0,1.0,2.0});
 
 // Result:
-// 0
+// 900
 // true
 // ""
 // true