diff --git a/test/jdk/tools/jlink/runtimeImage/AddOptionsTest.java b/test/jdk/tools/jlink/runtimeImage/AddOptionsTest.java
index 1ffe1240d07e7..8a2d23517cb57 100644
--- a/test/jdk/tools/jlink/runtimeImage/AddOptionsTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/AddOptionsTest.java
@@ -40,7 +40,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g AddOptionsTest
+ * @run main/othervm -Xmx2g AddOptionsTest
  */
 public class AddOptionsTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/BasicJlinkMissingJavaBase.java b/test/jdk/tools/jlink/runtimeImage/BasicJlinkMissingJavaBase.java
index b0d2a2d66f5b3..be63338a9d739 100644
--- a/test/jdk/tools/jlink/runtimeImage/BasicJlinkMissingJavaBase.java
+++ b/test/jdk/tools/jlink/runtimeImage/BasicJlinkMissingJavaBase.java
@@ -41,7 +41,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g BasicJlinkMissingJavaBase
+ * @run main/othervm -Xmx2g BasicJlinkMissingJavaBase
  */
 public class BasicJlinkMissingJavaBase extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/BasicJlinkTest.java b/test/jdk/tools/jlink/runtimeImage/BasicJlinkTest.java
index b97ebff9b4906..ba8230bce9479 100644
--- a/test/jdk/tools/jlink/runtimeImage/BasicJlinkTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/BasicJlinkTest.java
@@ -39,7 +39,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g BasicJlinkTest false
+ * @run main/othervm -Xmx2g BasicJlinkTest false
  */
 public class BasicJlinkTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/CustomModuleJlinkTest.java b/test/jdk/tools/jlink/runtimeImage/CustomModuleJlinkTest.java
index 369bccfecfce4..d732d9bd810fe 100644
--- a/test/jdk/tools/jlink/runtimeImage/CustomModuleJlinkTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/CustomModuleJlinkTest.java
@@ -39,7 +39,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g CustomModuleJlinkTest
+ * @run main/othervm -Xmx2g CustomModuleJlinkTest
  */
 public class CustomModuleJlinkTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/GenerateJLIClassesTest.java b/test/jdk/tools/jlink/runtimeImage/GenerateJLIClassesTest.java
index 533a8db30d0cc..821e4e5d9650b 100644
--- a/test/jdk/tools/jlink/runtimeImage/GenerateJLIClassesTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/GenerateJLIClassesTest.java
@@ -39,7 +39,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g GenerateJLIClassesTest
+ * @run main/othervm -Xmx2g GenerateJLIClassesTest
  */
 public class GenerateJLIClassesTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/JavaSEReproducibleTest.java b/test/jdk/tools/jlink/runtimeImage/JavaSEReproducibleTest.java
index d923358aed90d..82408c7b21e16 100644
--- a/test/jdk/tools/jlink/runtimeImage/JavaSEReproducibleTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/JavaSEReproducibleTest.java
@@ -40,7 +40,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g JavaSEReproducibleTest
+ * @run main/othervm -Xmx2g JavaSEReproducibleTest
  */
 public class JavaSEReproducibleTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/KeepPackagedModulesFailTest.java b/test/jdk/tools/jlink/runtimeImage/KeepPackagedModulesFailTest.java
index 8094579ecd505..6b176c236d02c 100644
--- a/test/jdk/tools/jlink/runtimeImage/KeepPackagedModulesFailTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/KeepPackagedModulesFailTest.java
@@ -41,7 +41,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g KeepPackagedModulesFailTest
+ * @run main/othervm -Xmx2g KeepPackagedModulesFailTest
  */
 public class KeepPackagedModulesFailTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/ModifiedFilesExitTest.java b/test/jdk/tools/jlink/runtimeImage/ModifiedFilesExitTest.java
index 709494b62566a..65b32d245c3f6 100644
--- a/test/jdk/tools/jlink/runtimeImage/ModifiedFilesExitTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/ModifiedFilesExitTest.java
@@ -40,7 +40,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g ModifiedFilesExitTest
+ * @run main/othervm -Xmx2g ModifiedFilesExitTest
  */
 public class ModifiedFilesExitTest extends ModifiedFilesTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/ModifiedFilesWarningTest.java b/test/jdk/tools/jlink/runtimeImage/ModifiedFilesWarningTest.java
index f52691dd85927..094fdd40d4731 100644
--- a/test/jdk/tools/jlink/runtimeImage/ModifiedFilesWarningTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/ModifiedFilesWarningTest.java
@@ -39,7 +39,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g ModifiedFilesWarningTest
+ * @run main/othervm -Xmx2g ModifiedFilesWarningTest
  */
 public class ModifiedFilesWarningTest extends ModifiedFilesTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/MultiHopTest.java b/test/jdk/tools/jlink/runtimeImage/MultiHopTest.java
index 88f91f238bd87..b74941884b1cc 100644
--- a/test/jdk/tools/jlink/runtimeImage/MultiHopTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/MultiHopTest.java
@@ -40,7 +40,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g MultiHopTest
+ * @run main/othervm -Xmx2g MultiHopTest
  */
 public class MultiHopTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/PackagedModulesVsRuntimeImageLinkTest.java b/test/jdk/tools/jlink/runtimeImage/PackagedModulesVsRuntimeImageLinkTest.java
index 9910be5f91974..f28eeecddf9d2 100644
--- a/test/jdk/tools/jlink/runtimeImage/PackagedModulesVsRuntimeImageLinkTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/PackagedModulesVsRuntimeImageLinkTest.java
@@ -49,7 +49,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g PackagedModulesVsRuntimeImageLinkTest
+ * @run main/othervm/timeout=1200 -Xmx2g PackagedModulesVsRuntimeImageLinkTest
  */
 public class PackagedModulesVsRuntimeImageLinkTest extends AbstractLinkableRuntimeTest {
 
@@ -76,6 +76,7 @@ void runTest(Helper helper, boolean isLinkableRuntime) throws Exception {
                 .output(helper.createNewImageDir("java-se-jmodfull"))
                 .addMods("java.se").call().assertSuccess();
 
+        System.out.println("Now comparing jmod-less and jmod-full) images");
         compareRecursively(javaSEruntimeLink, javaSEJmodFull);
     }
 
diff --git a/test/jdk/tools/jlink/runtimeImage/PatchedJDKModuleJlinkTest.java b/test/jdk/tools/jlink/runtimeImage/PatchedJDKModuleJlinkTest.java
index 3baa824e04990..26a9a47372f19 100644
--- a/test/jdk/tools/jlink/runtimeImage/PatchedJDKModuleJlinkTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/PatchedJDKModuleJlinkTest.java
@@ -42,7 +42,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g PatchedJDKModuleJlinkTest
+ * @run main/othervm -Xmx2g PatchedJDKModuleJlinkTest
  */
 public class PatchedJDKModuleJlinkTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/SystemModulesTest.java b/test/jdk/tools/jlink/runtimeImage/SystemModulesTest.java
index fac8cac112d14..e8faa3403bd94 100644
--- a/test/jdk/tools/jlink/runtimeImage/SystemModulesTest.java
+++ b/test/jdk/tools/jlink/runtimeImage/SystemModulesTest.java
@@ -41,7 +41,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g SystemModulesTest
+ * @run main/othervm -Xmx2g SystemModulesTest
  */
 public class SystemModulesTest extends AbstractLinkableRuntimeTest {
 
diff --git a/test/jdk/tools/jlink/runtimeImage/SystemModulesTest2.java b/test/jdk/tools/jlink/runtimeImage/SystemModulesTest2.java
index 6be4ad7321cea..b4a2afd644413 100644
--- a/test/jdk/tools/jlink/runtimeImage/SystemModulesTest2.java
+++ b/test/jdk/tools/jlink/runtimeImage/SystemModulesTest2.java
@@ -42,7 +42,7 @@
  *          jdk.jlink/jdk.tools.jimage
  * @build tests.* jdk.test.lib.process.OutputAnalyzer
  *        jdk.test.lib.process.ProcessTools
- * @run main/othervm -Xmx1g SystemModulesTest2
+ * @run main/othervm -Xmx2g SystemModulesTest2
  */
 public class SystemModulesTest2 extends AbstractLinkableRuntimeTest {