diff --git a/platform-tests/src/test/java/org/junit/platform/commons/util/StringUtilsTests.java b/platform-tests/src/test/java/org/junit/platform/commons/util/StringUtilsTests.java
index 6a78f23aace7..5034e8a77df7 100644
--- a/platform-tests/src/test/java/org/junit/platform/commons/util/StringUtilsTests.java
+++ b/platform-tests/src/test/java/org/junit/platform/commons/util/StringUtilsTests.java
@@ -139,6 +139,7 @@ void nullSafeToStringChecks() {
 		assertEquals("[a, b, c]", nullSafeToString(new char[] { 'a', 'b', 'c' }));
 		assertEquals("[foo, bar]", nullSafeToString(new String[] { "foo", "bar" }));
 		assertEquals("[34, 42]", nullSafeToString(new Integer[] { 34, 42 }));
+		assertEquals("[34.0, 42.0]", nullSafeToString(new Double[] { 34.0, 42.0 }));
 		assertEquals("[[2, 4], [3, 9]]", nullSafeToString(new Integer[][] { { 2, 4 }, { 3, 9 } }));
 	}