diff --git a/src/main/java/com/casper/sdk/exception/CasperClientException.java b/src/main/java/com/casper/sdk/exception/CasperClientException.java
index 20204ee3a..309f2f679 100644
--- a/src/main/java/com/casper/sdk/exception/CasperClientException.java
+++ b/src/main/java/com/casper/sdk/exception/CasperClientException.java
@@ -9,15 +9,15 @@
  */
 public class CasperClientException extends RuntimeException {
 
-    public CasperClientException(CasperClientErrorData error) {
-        super(String.format("%s (code: %d)", error.getMessage(), error.getCode()));
+    public CasperClientException(final CasperClientErrorData error) {
+        super(String.format("%s (code: %d)%s", error.getMessage(), error.getCode(), error.getData() != null ? " " + error.getData() : ""));
     }
 
-    public CasperClientException(String message, Throwable cause) {
+    public CasperClientException(final String message, final Throwable cause) {
         super(message, cause);
     }
 
-    public CasperClientException(String message) {
+    public CasperClientException(final String message) {
         super(message);
     }
 }
diff --git a/src/test/java/com/casper/sdk/service/CasperServiceTests.java b/src/test/java/com/casper/sdk/service/CasperServiceTests.java
index 0e3b6db71..e9018a9e8 100644
--- a/src/test/java/com/casper/sdk/service/CasperServiceTests.java
+++ b/src/test/java/com/casper/sdk/service/CasperServiceTests.java
@@ -488,7 +488,7 @@ void getCasperClientExceptionExceptionBlockNotKnown() {
                 .withBody("$.params.deploy_hash", "abc")
                 .thenDispatch(getClass().getResource("/deploy-samples/info_get_deploy_error.json"));
 
-        final String expectedMessage = "Invalid params (code: -32602)";
+        final String expectedMessage = "Invalid params (code: -32602) Failed to parse 'params' field: could not convert slice to array";
 
         final CasperClientException casperClientException = assertThrows(CasperClientException.class,
                 () -> casperServiceMock.getDeploy("abc"));