diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LauncherSupport.java b/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LauncherSupport.java
index d83f86214..d96876d27 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LauncherSupport.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/LauncherSupport.java
@@ -44,6 +44,7 @@ import org.junit.platform.launcher.core.LauncherFactory;
 import org.junit.platform.launcher.listeners.SummaryGeneratingListener;
 import org.junit.platform.launcher.listeners.TestExecutionSummary;
 
+import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -153,6 +154,29 @@ public class LauncherSupport {
                         } catch (Exception e) {
                             // ignore
                         }
+                        // close the streams that we had used to redirect System.out/System.err
+                        try {
+                            firstListener.switchedSysOutHandle.ifPresent((h) -> {
+                                try {
+                                    h.close();
+                                } catch (Exception e) {
+                                    // ignore
+                                }
+                            });
+                        } catch (Exception e) {
+                            // ignore
+                        }
+                        try {
+                            firstListener.switchedSysErrHandle.ifPresent((h) -> {
+                                try {
+                                    h.close();
+                                } catch (Exception e) {
+                                    // ignore
+                                }
+                            });
+                        } catch (Exception e) {
+                            // ignore
+                        }
                     }
                     handleTestExecutionCompletion(test, firstListener.getSummary());
                 } finally {
@@ -600,7 +624,7 @@ public class LauncherSupport {
         }
     }
 
-    private final class SwitchedStreamHandle {
+    private final class SwitchedStreamHandle implements AutoCloseable {
         private final PipedOutputStream outputStream;
         private final SysOutErrStreamReader streamReader;
 
@@ -608,6 +632,12 @@ public class LauncherSupport {
             this.streamReader = streamReader;
             this.outputStream = outputStream;
         }
+
+        @Override
+        public void close() throws Exception {
+            outputStream.close();
+            streamReader.sourceStream.close();
+        }
     }
 
     private final class Listener extends SummaryGeneratingListener {