diff --git a/src/jvmMain/kotlin/ehn/techiop/hcert/kotlin/chain/impl/DefaultSchemaValidationService.kt b/src/jvmMain/kotlin/ehn/techiop/hcert/kotlin/chain/impl/DefaultSchemaValidationService.kt
index c6393a88..d2334ae1 100644
--- a/src/jvmMain/kotlin/ehn/techiop/hcert/kotlin/chain/impl/DefaultSchemaValidationService.kt
+++ b/src/jvmMain/kotlin/ehn/techiop/hcert/kotlin/chain/impl/DefaultSchemaValidationService.kt
@@ -22,14 +22,13 @@ actual class DefaultSchemaValidationService : SchemaValidationService {
             val parser = Parser(uriResolver = { resource })
             val schema = parser.parse(URI.create("dummy:///"))
             val result = schema.validateBasic(json)
-            result.errors?.let {
-                if (it.isNotEmpty()) {
-                    //it.forEach { println("${it.error} - ${it.instanceLocation}") }
-                    throw Throwable("Data does not follow schema: ${result.errors}")
+            result.errors?.let { error ->
+                if (error.isNotEmpty()) {
+                    throw Throwable("Data does not follow schema: ${result.errors?.map { "${it.error}: ${it.keywordLocation}, ${it.instanceLocation}" }}")
                 }
             }
         } catch (t: Throwable) {
-            verificationResult.error = Error.CBOR_DESERIALIZATION_FAILED
+            throw t.also { verificationResult.error = Error.CBOR_DESERIALIZATION_FAILED }
         }
     }