diff --git a/test/jdk/java/lang/constant/ClassDescTest.java b/test/jdk/java/lang/constant/ClassDescTest.java
index c297af1f294..7551edff11a 100644
--- a/test/jdk/java/lang/constant/ClassDescTest.java
+++ b/test/jdk/java/lang/constant/ClassDescTest.java
@@ -290,7 +290,8 @@ public class ClassDescTest extends SymbolicDescTest {
         String descWith255ArrayDims = "[".repeat(255);
         assertThrows(IllegalArgumentException.class, () -> ClassDesc.ofDescriptor(descWith255ArrayDims + "[Ljava/lang/String;"),
                 "can't create an array type descriptor with more than 255 dimensions");
-        assertThrows(IllegalArgumentException.class, () -> ClassDesc.ofDescriptor(descWith255ArrayDims + "Ljava/lang/String;"),
+        ClassDesc arrWith255Dims = ClassDesc.ofDescriptor(descWith255ArrayDims + "Ljava/lang/String;");
+        assertThrows(IllegalArgumentException.class, () -> arrWith255Dims.arrayType(1),
                 "can't create an array type descriptor with more than 255 dimensions");
     }
 
diff --git a/test/jdk/java/lang/constant/boottest/java.base/jdk/internal/constant/ConstantUtilsTest.java b/test/jdk/java/lang/constant/ConstantUtilsTest.java
similarity index 87%
rename from test/jdk/java/lang/constant/boottest/java.base/jdk/internal/constant/ConstantUtilsTest.java
rename to test/jdk/java/lang/constant/ConstantUtilsTest.java
index 7ed3ae5d927..c614132c7e5 100644
--- a/test/jdk/java/lang/constant/boottest/java.base/jdk/internal/constant/ConstantUtilsTest.java
+++ b/test/jdk/java/lang/constant/ConstantUtilsTest.java
@@ -21,17 +21,19 @@
  * questions.
  */
 
-package jdk.internal.constant;
-
 import java.lang.constant.*;
 import java.util.*;
 
 import static org.junit.jupiter.api.Assertions.*;
+
+import jdk.internal.constant.ConstantAccess;
+import jdk.internal.constant.ConstantUtils;
 import org.junit.jupiter.api.Test;
 
 /*
  * @test
  * @bug 8303930
+ * @build java.base/jdk.internal.constant.*
  * @compile ConstantUtilsTest.java
  * @modules java.base/jdk.internal.constant
  * @run junit ConstantUtilsTest
@@ -43,7 +45,7 @@ public class ConstantUtilsTest {
     @Test
     public void testValidateMemberName() {
         assertThrows(NullPointerException.class, () -> ConstantUtils.validateMemberName(null, false));
-        assertThrows(NullPointerException.class, () -> ConstantUtils.validateMemberName("", false));
+        assertThrows(IllegalArgumentException.class, () -> ConstantUtils.validateMemberName("", false));
 
         List<String> badNames = List.of(".", ";", "[", "/", "<", ">");
         for (String n : badNames) {
@@ -53,7 +55,7 @@ public class ConstantUtilsTest {
 
     @Test
     public void testSkipOverFieldSignatureVoid() {
-       int ret = ConstantUtils.skipOverFieldSignature("(V)V", 1, 4);
+       int ret = ConstantAccess.skipOverFieldSignature("(V)V", 1, 4);
        assertEquals(0, ret, "Descriptor of (V)V starting at index 1, void disallowed");
     }
 }
diff --git a/test/jdk/java/lang/constant/boottest/TEST.properties b/test/jdk/java/lang/constant/boottest/TEST.properties
deleted file mode 100644
index db8f3aca8bf..00000000000
--- a/test/jdk/java/lang/constant/boottest/TEST.properties
+++ /dev/null
@@ -1,3 +0,0 @@
-# This file identifies root(s) of the test-ng hierarchy.
-
-lib.dirs = /lib/testlibrary/bootlib
diff --git a/test/jdk/java/lang/constant/java.base/jdk/internal/constant/ConstantAccess.java b/test/jdk/java/lang/constant/java.base/jdk/internal/constant/ConstantAccess.java
new file mode 100644
index 00000000000..a6a671cf9ca
--- /dev/null
+++ b/test/jdk/java/lang/constant/java.base/jdk/internal/constant/ConstantAccess.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.constant;
+
+// Exposes packaage-private methods for testing.
+public final class ConstantAccess {
+    public static int skipOverFieldSignature(String descriptor, int start, int end) {
+        return ConstantUtils.skipOverFieldSignature(descriptor, start, end);
+    }
+}