diff --git a/src/main/java/bee/Fail.java b/src/main/java/bee/Fail.java
index 05d52da3d..f395eb909 100644
--- a/src/main/java/bee/Fail.java
+++ b/src/main/java/bee/Fail.java
@@ -64,7 +64,6 @@ public String getMessage() {
         if (size == 0) {
             builder.append("No solution.");
         } else {
-            builder.append(Platform.EOL);
             for (String solution : solutions) {
                 builder.append(Platform.EOL).append("  -").append(solution);
             }
diff --git a/src/main/java/bee/task/Test.java b/src/main/java/bee/task/Test.java
index 3d739ea50..1e30c2f2d 100644
--- a/src/main/java/bee/task/Test.java
+++ b/src/main/java/bee/task/Test.java
@@ -274,11 +274,9 @@ private void buildFailure(Fail fail, List<Failure> list) {
                     StackTraceElement element = e.error.getStackTrace()[0];
                     int line = element.getClassName().equals(name) ? element.getLineNumber() : 0;
 
-                    StringBuilder message = new StringBuilder("FIX: ").append(e.name())
-                            .append(" @")
-                            .append(line)
-                            .append(Platform.EOL)
-                            .append(e.message());
+                    StringBuilder message = new StringBuilder(e.name());
+                    if (line != 0) message.append(" @line").append(line);
+                    message.append(Platform.EOL).append(e.message().indent(4));
 
                     fail.solve(message);
                 }
diff --git a/src/main/java/bee/util/Java.java b/src/main/java/bee/util/Java.java
index db389d293..87d89d7d0 100644
--- a/src/main/java/bee/util/Java.java
+++ b/src/main/java/bee/util/Java.java
@@ -436,6 +436,10 @@ public void endCommand(String name, Command command) {
              */
             @Override
             protected void write(int type, String message) {
+                if (message == null || message.isEmpty()) {
+                    return;
+                }
+
                 switch (type) {
                 case TRACE:
                     transporter.trace(message);
@@ -467,6 +471,10 @@ protected void write(int type, String message) {
              */
             @Override
             protected void write(Throwable error) {
+                if (error == null) {
+                    return;
+                }
+
                 try {
                     ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                     ObjectOutputStream out = new ObjectOutputStream(bytes);