diff --git a/buffer/src/main/java/io/netty/buffer/PooledByteBufAllocator.java b/buffer/src/main/java/io/netty/buffer/PooledByteBufAllocator.java
index a840394b63..82ee239579 100644
--- a/buffer/src/main/java/io/netty/buffer/PooledByteBufAllocator.java
+++ b/buffer/src/main/java/io/netty/buffer/PooledByteBufAllocator.java
@@ -77,19 +77,19 @@ public class PooledByteBufAllocator extends AbstractByteBufAllocator {
                                 PlatformDependent.maxDirectMemory() / defaultChunkSize / 2 / 3)));
 
         if (logger.isDebugEnabled()) {
-            logger.debug("io.netty.allocator.numHeapArenas: {}", DEFAULT_NUM_HEAP_ARENA);
-            logger.debug("io.netty.allocator.numDirectArenas: {}", DEFAULT_NUM_DIRECT_ARENA);
+            logger.debug("-Dio.netty.allocator.numHeapArenas: {}", DEFAULT_NUM_HEAP_ARENA);
+            logger.debug("-Dio.netty.allocator.numDirectArenas: {}", DEFAULT_NUM_DIRECT_ARENA);
             if (pageSizeFallbackCause == null) {
-                logger.debug("io.netty.allocator.pageSize: {}", DEFAULT_PAGE_SIZE);
+                logger.debug("-Dio.netty.allocator.pageSize: {}", DEFAULT_PAGE_SIZE);
             } else {
-                logger.debug("io.netty.allocator.pageSize: {}", DEFAULT_PAGE_SIZE, pageSizeFallbackCause);
+                logger.debug("-Dio.netty.allocator.pageSize: {}", DEFAULT_PAGE_SIZE, pageSizeFallbackCause);
             }
             if (maxOrderFallbackCause == null) {
-                logger.debug("io.netty.allocator.maxOrder: {}", DEFAULT_MAX_ORDER);
+                logger.debug("-Dio.netty.allocator.maxOrder: {}", DEFAULT_MAX_ORDER);
             } else {
-                logger.debug("io.netty.allocator.maxOrder: {}", DEFAULT_MAX_ORDER, maxOrderFallbackCause);
+                logger.debug("-Dio.netty.allocator.maxOrder: {}", DEFAULT_MAX_ORDER, maxOrderFallbackCause);
             }
-            logger.debug("io.netty.allocator.chunkSize: {}", DEFAULT_PAGE_SIZE << DEFAULT_MAX_ORDER);
+            logger.debug("-Dio.netty.allocator.chunkSize: {}", DEFAULT_PAGE_SIZE << DEFAULT_MAX_ORDER);
         }
     }
 
diff --git a/common/src/main/java/io/netty/util/ResourceLeakDetector.java b/common/src/main/java/io/netty/util/ResourceLeakDetector.java
index 6110b46715..be3111ccf6 100644
--- a/common/src/main/java/io/netty/util/ResourceLeakDetector.java
+++ b/common/src/main/java/io/netty/util/ResourceLeakDetector.java
@@ -35,7 +35,7 @@ public final class ResourceLeakDetector<T> {
     private static final InternalLogger logger = InternalLoggerFactory.getInstance(ResourceLeakDetector.class);
 
     static {
-        logger.debug("io.netty.noResourceLeakDetection: {}", DISABLED);
+        logger.debug("-Dio.netty.noResourceLeakDetection: {}", DISABLED);
     }
 
     private static final int DEFAULT_SAMPLING_INTERVAL = 113;
diff --git a/common/src/main/java/io/netty/util/internal/PlatformDependent.java b/common/src/main/java/io/netty/util/internal/PlatformDependent.java
index 060f5d7bd3..df9b52d87c 100644
--- a/common/src/main/java/io/netty/util/internal/PlatformDependent.java
+++ b/common/src/main/java/io/netty/util/internal/PlatformDependent.java
@@ -73,7 +73,7 @@ public final class PlatformDependent {
 
     static {
         if (logger.isDebugEnabled()) {
-            logger.debug("io.netty.noPreferDirect: {}", !DIRECT_BUFFER_PREFERRED);
+            logger.debug("-Dio.netty.noPreferDirect: {}", !DIRECT_BUFFER_PREFERRED);
         }
 
         if (!hasUnsafe()) {
@@ -446,12 +446,14 @@ public final class PlatformDependent {
     }
 
     private static boolean hasUnsafe0() {
+        boolean noUnsafe = SystemPropertyUtil.getBoolean("io.netty.noUnsafe", false);
+        logger.debug("-Dio.netty.noUnsafe: {}", noUnsafe);
+
         if (isAndroid()) {
             logger.debug("sun.misc.Unsafe: unavailable (Android)");
             return false;
         }
 
-        boolean noUnsafe = SystemPropertyUtil.getBoolean("io.netty.noUnsafe", false);
         if (noUnsafe) {
             logger.debug("sun.misc.Unsafe: unavailable (io.netty.noUnsafe)");
             return false;
@@ -550,6 +552,8 @@ public final class PlatformDependent {
 
     private static boolean hasJavassist0() {
         boolean noJavassist = SystemPropertyUtil.getBoolean("io.netty.noJavassist", false);
+        logger.debug("-Dio.netty.noJavassist: {}", noJavassist);
+
         if (noJavassist) {
             logger.debug("Javassist: unavailable (io.netty.noJavassist)");
             return false;
diff --git a/testsuite/src/test/java/io/netty/testsuite/transport/socket/SocketConnectionAttemptTest.java b/testsuite/src/test/java/io/netty/testsuite/transport/socket/SocketConnectionAttemptTest.java
index 4b8c36fe94..461279c607 100644
--- a/testsuite/src/test/java/io/netty/testsuite/transport/socket/SocketConnectionAttemptTest.java
+++ b/testsuite/src/test/java/io/netty/testsuite/transport/socket/SocketConnectionAttemptTest.java
@@ -20,16 +20,14 @@ import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelInboundHandlerAdapter;
 import io.netty.channel.ChannelOption;
-import io.netty.testsuite.util.TestUtils;
 import io.netty.util.internal.SystemPropertyUtil;
-import org.junit.Assert;
+import io.netty.util.internal.logging.InternalLoggerFactory;
 import org.junit.Assume;
 import org.junit.Test;
 
 import java.io.IOException;
 import java.net.ConnectException;
 import java.net.InetSocketAddress;
-import java.net.NoRouteToHostException;
 import java.net.Socket;
 
 import static org.hamcrest.CoreMatchers.*;
@@ -39,6 +37,11 @@ public class SocketConnectionAttemptTest extends AbstractClientSocketTest {
 
     private static final String BAD_HOST = SystemPropertyUtil.get("io.netty.testsuite.badHost", "255.255.255.0");
 
+    static {
+        InternalLoggerFactory.getInstance(SocketConnectionAttemptTest.class).debug(
+                "-Dio.netty.testsuite.badHost: {}", BAD_HOST);
+    }
+
     @Test(timeout = 30000)
     public void testConnectTimeout() throws Throwable {
         run();
diff --git a/transport/src/main/java/io/netty/channel/MultithreadEventLoopGroup.java b/transport/src/main/java/io/netty/channel/MultithreadEventLoopGroup.java
index ab27b219b3..1faa53b5c7 100644
--- a/transport/src/main/java/io/netty/channel/MultithreadEventLoopGroup.java
+++ b/transport/src/main/java/io/netty/channel/MultithreadEventLoopGroup.java
@@ -38,7 +38,7 @@ public abstract class MultithreadEventLoopGroup extends MultithreadEventExecutor
                 "io.netty.eventLoopThreads", Runtime.getRuntime().availableProcessors() * 2));
 
         if (logger.isDebugEnabled()) {
-            logger.debug("io.netty.eventLoopThreads: {}", DEFAULT_EVENT_LOOP_THREADS);
+            logger.debug("-Dio.netty.eventLoopThreads: {}", DEFAULT_EVENT_LOOP_THREADS);
         }
     }
 
diff --git a/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java b/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
index dfd6efd801..6f21dc9b35 100644
--- a/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
+++ b/transport/src/main/java/io/netty/channel/nio/NioEventLoop.java
@@ -84,8 +84,8 @@ public final class NioEventLoop extends SingleThreadEventLoop {
         SELECTOR_AUTO_REBUILD_THRESHOLD = selectorAutoRebuildThreshold;
 
         if (logger.isDebugEnabled()) {
-            logger.debug("io.netty.noKeySetOptimization: {}", DISABLE_KEYSET_OPTIMIZATION);
-            logger.debug("io.netty.selectorAutoRebuildThreshold: {}", SELECTOR_AUTO_REBUILD_THRESHOLD);
+            logger.debug("-Dio.netty.noKeySetOptimization: {}", DISABLE_KEYSET_OPTIMIZATION);
+            logger.debug("-Dio.netty.selectorAutoRebuildThreshold: {}", SELECTOR_AUTO_REBUILD_THRESHOLD);
         }
     }