Post-merge fix wrt #599, 2.19 branch

Author: cowtowncoder

cbor/src/test/java/com/fasterxml/jackson/dataformat/cbor/StringRef599Test.java

@@ -2,10 +2,12 @@
 
 import java.util.Arrays;
 
+import org.junit.jupiter.api.Test;
+
 import com.fasterxml.jackson.core.JsonToken;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
-import org.junit.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class StringRef599Test extends CBORTestBase
 {