diff --git a/libs/core/src/test/java/org/elasticsearch/core/GlobTests.java b/libs/core/src/test/java/org/elasticsearch/core/GlobTests.java
index 1025b8d42e7ca..17d3203d3f378 100644
--- a/libs/core/src/test/java/org/elasticsearch/core/GlobTests.java
+++ b/libs/core/src/test/java/org/elasticsearch/core/GlobTests.java
@@ -177,7 +177,7 @@ interface CharPredicate {
     }
 
     private String randomAsciiString(int length) {
-        return randomAsciiString(length, ch -> ch >= ' ' && ch <= '~');
+        return randomAsciiString(length, ch -> ch >= ' ' && ch <= '~' && ch != '*');
     }
 
     private String randomAsciiStringNoAsterisks(final int length) {