diff --git a/bindings/java/src/net/hyperic/sigar/test/SigarTestCase.java b/bindings/java/src/net/hyperic/sigar/test/SigarTestCase.java
index 59547798..a5c3a3cd 100644
--- a/bindings/java/src/net/hyperic/sigar/test/SigarTestCase.java
+++ b/bindings/java/src/net/hyperic/sigar/test/SigarTestCase.java
@@ -55,6 +55,7 @@ public abstract class SigarTestCase extends TestCase {
     public static void closeSigar() {
         if (sigar != null) {
             sigar.close();
+            sigar = null;
         }
     }
 
diff --git a/bindings/java/src/net/hyperic/sigar/test/TestCpu.java b/bindings/java/src/net/hyperic/sigar/test/TestCpu.java
index ce112351..e31dea04 100644
--- a/bindings/java/src/net/hyperic/sigar/test/TestCpu.java
+++ b/bindings/java/src/net/hyperic/sigar/test/TestCpu.java
@@ -2,7 +2,6 @@ package net.hyperic.sigar.test;
 
 import net.hyperic.sigar.Sigar;
 import net.hyperic.sigar.SigarNotImplementedException;
-import net.hyperic.sigar.SigarProxy;
 import net.hyperic.sigar.Cpu;
 
 public class TestCpu extends SigarTestCase {
@@ -29,8 +28,7 @@ public class TestCpu extends SigarTestCase {
     }
 
     public void testCreate() throws Exception {
-        SigarProxy sigar = Sigar.getInstance(); //test reuse
-
+        Sigar sigar = getSigar();
         Cpu cpu = sigar.getCpu();
 
         traceln("getCpu:");
diff --git a/bindings/java/src/net/hyperic/sigar/test/TestPTQL.java b/bindings/java/src/net/hyperic/sigar/test/TestPTQL.java
index 6b9424fa..1af3ff14 100644
--- a/bindings/java/src/net/hyperic/sigar/test/TestPTQL.java
+++ b/bindings/java/src/net/hyperic/sigar/test/TestPTQL.java
@@ -2,7 +2,7 @@ package net.hyperic.sigar.test;
 
 import net.hyperic.sigar.SigarException;
 import net.hyperic.sigar.SigarProxy;
-import net.hyperic.sigar.SynchronizedSigarProxyCache;
+import net.hyperic.sigar.SigarProxyCache;
 import net.hyperic.sigar.SigarNotImplementedException;
 
 import net.hyperic.sigar.ptql.ProcessQuery;
@@ -140,7 +140,8 @@ public class TestPTQL extends SigarTestCase {
     }
 
     public void testCreate() throws Exception {
-        SigarProxy proxy = SynchronizedSigarProxyCache.getInstance();
+        SigarProxy proxy =
+            SigarProxyCache.newInstance(getSigar());
 
         testOK(proxy);
         testMalformed(proxy);