diff --git a/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_custom_BusyIndicator.java b/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_custom_BusyIndicator.java
index 2add7920c7..8c83d477ca 100644
--- a/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_custom_BusyIndicator.java	
+++ b/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_custom_BusyIndicator.java	
@@ -16,6 +16,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CountDownLatch;
@@ -37,6 +38,11 @@ public class Test_org_eclipse_swt_custom_BusyIndicator {
 	@Test
 	@Timeout(value = 30)
 	public void testShowWhile() {
+		if (SwtTestUtil.isLinux) {
+			int availableProcessors = Runtime.getRuntime().availableProcessors();
+			assumeTrue(availableProcessors >= 4,
+					"Need at least 4 CPUs for this test to be reliable on Linux: " + availableProcessors);
+		}
 		// Executors.newSingleThreadExecutor() hangs on some Linux configurations
 		try (ExecutorService executor = Executors.newFixedThreadPool(2)){
 			Shell shell = new Shell();