diff --git a/src/main/java/org/simulator/sbml/EquationSystem.java b/src/main/java/org/simulator/sbml/EquationSystem.java
index 18d020b9..7a979916 100644
--- a/src/main/java/org/simulator/sbml/EquationSystem.java
+++ b/src/main/java/org/simulator/sbml/EquationSystem.java
@@ -10,6 +10,7 @@
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
+import java.util.Random;
 import java.util.Set;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.logging.Level;
@@ -110,6 +111,11 @@ public abstract class EquationSystem
    * Holds the current time of the simulation
    */
   protected double currentTime;
+  /**
+   * A random number generator used for stochastic decisions (e.g., picking events).
+   * It is instantiated once so that the simulation can be seeded.
+   */
+  protected Random randomGenerator = new Random(12345L);
 
   /**
    * This array stores for every event an object of {@link SBMLEventInProgress} that is used to
@@ -1850,7 +1856,7 @@ public void propertyChange(PropertyChangeEvent propertyChangeEvent) {
    * @param highOrderEvents
    */
   protected void pickRandomEvent(List<Integer> highOrderEvents) {
-    int randomIndex = ThreadLocalRandom.current().nextInt(highOrderEvents.size());
+    int randomIndex = randomGenerator.nextInt(highOrderEvents.size());
     Integer winner = highOrderEvents.get(randomIndex);
     highOrderEvents.clear();
     highOrderEvents.add(winner);
diff --git a/src/test/java/org/simulator/sbml/SBMLTestSuiteTest.java b/src/test/java/org/simulator/sbml/SBMLTestSuiteTest.java
index 4f56084e..debef18a 100644
--- a/src/test/java/org/simulator/sbml/SBMLTestSuiteTest.java
+++ b/src/test/java/org/simulator/sbml/SBMLTestSuiteTest.java
@@ -26,7 +26,7 @@
 /**
  * Run full sbml-test-suite
  */
-@RunWith(value = Parameterized.class)
+@RunWith(Parameterized.class)
 public class SBMLTestSuiteTest {
 
   private String path;
@@ -53,11 +53,8 @@ public SBMLTestSuiteTest(String path) {
   @Parameters(name = "{index}: {0}")
   public static Iterable<Object[]> data() {
 
-    // environment variable for semantic test case folder
     String testsuite_path = TestUtils.getPathForTestResource(
-        File.separator + "sbml-test-suite" + File.separator + "cases" + File.separator + "semantic"
-            + File.separator);
-    System.out.println(SBML_TEST_SUITE_PATH + ": " + testsuite_path);
+        File.separator + "sbml-test-suite" + File.separator + "cases" + File.separator + "semantic" + File.separator);
 
     if (testsuite_path.length() == 0) {
       Object[][] resources = new String[0][1];
@@ -108,8 +105,6 @@ public void testModel() throws IOException {
         "01165", "01167", "01168", "01471", "01472", "01473", "01475", "01476", "01477", "01778",
         // sbml model with changing compartment size (see issue #50)
         "01507", "01508", "01511",
-        // failing due to long run time (see issue #39)
-        "01287", "01592",
         // failing due to delay in rateOf (see issue #46)
         "01400", "01401", "01403", "01406", "01409",
         // failing due to event triggers before mentioned condition (see issue #44)