diff --git a/src/test/java/com/caucho/hessian/io/java17/base/SerializeCompatibleTest.java b/src/test/java/com/caucho/hessian/io/java17/base/SerializeCompatibleTest.java
index 5f11a18..57b5212 100644
--- a/src/test/java/com/caucho/hessian/io/java17/base/SerializeCompatibleTest.java
+++ b/src/test/java/com/caucho/hessian/io/java17/base/SerializeCompatibleTest.java
@@ -65,9 +65,14 @@ public static void setUp() {
      * 'cause' is bound to lost here as getCause may return null
      */
     @Test
-    public void test_case_1() throws IOException {
+    public void test_case_1() {
         if (isLessThanJdk17) {
-            test_JavaCurrencyWrapper(factory, originFactory);
+            try {
+                test_JavaCurrencyWrapper(factory, originFactory);
+            } catch (Exception e) {
+                e.printStackTrace();
+                Assert.assertNull(e.getMessage(), e);
+            }
         }
     }
 
@@ -77,9 +82,14 @@ public void test_case_1() throws IOException {
      * @throws IOException
      */
     @Test
-    public void test_case_2() throws IOException {
+    public void test_case_2() {
         if (isLessThanJdk17) {
-            test_JavaCurrencyWrapper(originFactory, factory);
+            try {
+                test_JavaCurrencyWrapper(originFactory, factory);
+            } catch (Exception e) {
+                e.printStackTrace();
+                Assert.assertNull(e.getMessage(), e);
+            }
         }
     }
 
@@ -88,16 +98,26 @@ public void test_case_2() throws IOException {
      * @throws IOException
      */
     @Test
-    public void test_case_3() throws IOException {
+    public void test_case_3() {
         if (isLessThanJdk17) {
-            test_JavaCurrencyDirectly(factory, originFactory);
+            try {
+                test_JavaCurrencyDirectly(factory, originFactory);
+            } catch (Exception e) {
+                e.printStackTrace();
+                Assert.assertNull(e.getMessage(), e);
+            }
         }
     }
 
     @Test
-    public void test_case_4() throws IOException {
+    public void test_case_4() {
         if (isLessThanJdk17) {
-            test_JavaCurrencyDirectly(originFactory, factory);
+            try {
+                test_JavaCurrencyDirectly(originFactory, factory);
+            } catch (Exception e) {
+                e.printStackTrace();
+                Assert.assertNull(e.getMessage(), e);
+            }
         }
     }
 
@@ -106,9 +126,14 @@ public void test_case_4() throws IOException {
      * @throws IOException
      */
     @Test
-    public void test_case_5() throws IOException {
+    public void test_case_5() {
         if (isLessThanJdk17()) {
-            test_JavaCurrencyWrapperList(factory, factory);
+            try {
+                test_JavaCurrencyWrapperList(factory, factory);
+            } catch (Exception e) {
+                e.printStackTrace();
+                Assert.assertNull(e.getMessage(), e);
+            }
         }
     }
 
@@ -117,16 +142,26 @@ public void test_case_5() throws IOException {
      * @throws IOException
      */
     @Test
-    public void test_bytes_equals() throws IOException {
+    public void test_bytes_equals() {
         if (isLessThanJdk17()) {
-            test_Serialize(originFactory, factory);
+            try {
+                test_Serialize(originFactory, factory);
+            } catch (Exception e) {
+                e.printStackTrace();
+                Assert.assertNull(e.getMessage(), e);
+            }
         }
     }
 
     @Test
-    public void test_decode_encode_jdk17() throws IOException {
+    public void test_decode_encode_jdk17() {
         if (!isLessThanJdk17()) {
-            test_JavaCurrencyWrapper(factory, factory);
+            try {
+                test_JavaCurrencyWrapper(factory, factory);
+            } catch (Exception e) {
+                e.printStackTrace();
+                Assert.assertNull(e.getMessage(), e);
+            }
         }
 
     }
@@ -151,7 +186,7 @@ private void test_JavaCurrencyWrapper(SerializerFactory serialize, SerializerFac
         throws IOException {
         if (isLessThanJdk17()) {
             CurrencyWrapper cw = new CurrencyWrapper();
-            cw.setCurrency(Currency.getInstance(Locale.getDefault()));
+            cw.setCurrency(Currency.getInstance(Locale.SIMPLIFIED_CHINESE));
 
             Object result = doEncodeNDecode(cw, serialize, deserialize);
             Assert.assertTrue(result instanceof CurrencyWrapper);
@@ -163,7 +198,7 @@ private void test_JavaCurrencyWrapper(SerializerFactory serialize, SerializerFac
     private void test_JavaCurrencyDirectly(SerializerFactory serialize, SerializerFactory deserialize)
         throws IOException {
         if (isLessThanJdk17()) {
-            Currency origin = Currency.getInstance(Locale.getDefault());
+            Currency origin = Currency.getInstance(Locale.SIMPLIFIED_CHINESE);
 
             Object result = doEncodeNDecode(origin, serialize, deserialize);
             Assert.assertTrue(result instanceof Currency);
@@ -191,7 +226,7 @@ private void test_JavaCurrencyWrapperList(SerializerFactory serialize, Serialize
     private void test_Serialize(SerializerFactory originFactory, SerializerFactory newFactory)
         throws IOException {
         CurrencyWrapper cw = new CurrencyWrapper();
-        cw.setCurrency(Currency.getInstance(Locale.getDefault()));
+        cw.setCurrency(Currency.getInstance(Locale.SIMPLIFIED_CHINESE));
 
         byte[] resultOrigin = doSerialize(cw, originFactory);
         byte[] resultNew = doSerialize(cw, factory);
diff --git a/src/test/java/com/caucho/hessian/io/java17/base/SerializeFactoryWithCurrency.java b/src/test/java/com/caucho/hessian/io/java17/base/SerializeFactoryWithCurrency.java
index c6a40bf..26648f4 100644
--- a/src/test/java/com/caucho/hessian/io/java17/base/SerializeFactoryWithCurrency.java
+++ b/src/test/java/com/caucho/hessian/io/java17/base/SerializeFactoryWithCurrency.java
@@ -18,8 +18,6 @@
 
 import com.caucho.hessian.io.Deserializer;
 import com.caucho.hessian.io.HessianProtocolException;
-import com.caucho.hessian.io.JavaDeserializer;
-import com.caucho.hessian.io.JavaSerializer;
 import com.caucho.hessian.io.Serializer;
 import com.caucho.hessian.io.SerializerFactory;