diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/JsonRpcError.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/JsonRpcError.java
index 61ff0ac312..00aaafc52a 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/JsonRpcError.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/JsonRpcError.java
@@ -170,7 +170,12 @@ public enum JsonRpcError {
   METHOD_UNIMPLEMENTED(-50200, "MethodUnimplemented"),
 
   /** Plugins error */
-  PLUGIN_NOT_FOUND(-60000, "Plugin not found");
+  PLUGIN_NOT_FOUND(-60000, "Plugin not found"),
+
+  // Retesteth Errors
+
+  BLOCK_RLP_IMPORT_ERROR(-32000, "Could not decode RLP for Block"),
+  BLOCK_IMPORT_ERROR(-32000, "Could not import Block");
 
   private final int code;
   private final String message;
diff --git a/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java b/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java
index c2d9bd2956..1cf096b988 100644
--- a/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java
+++ b/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java
@@ -17,6 +17,8 @@ package org.hyperledger.besu.ethereum.retesteth.methods;
 import org.hyperledger.besu.ethereum.ProtocolContext;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.JsonRpcMethod;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcError;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
 import org.hyperledger.besu.ethereum.core.Block;
@@ -33,7 +35,7 @@ import org.apache.tuweni.bytes.Bytes;
 public class TestImportRawBlock implements JsonRpcMethod {
   private static final Logger LOG = LogManager.getLogger();
 
-  private static final String METHOD_NAME = "test_importRawBlock";
+  public static final String METHOD_NAME = "test_importRawBlock";
 
   private final RetestethContext context;
 
@@ -59,7 +61,8 @@ public class TestImportRawBlock implements JsonRpcMethod {
               RLP.input(Bytes.fromHexString(input)), protocolSpec.getBlockHeaderFunctions());
     } catch (final RLPException | IllegalArgumentException e) {
       LOG.debug("Failed to parse block RLP", e);
-      return new JsonRpcSuccessResponse(requestContext.getRequest().getId(), "0x");
+      return new JsonRpcErrorResponse(
+          requestContext.getRequest().getId(), JsonRpcError.BLOCK_RLP_IMPORT_ERROR);
     }
 
     final BlockImporter blockImporter = protocolSpec.getBlockImporter();
@@ -72,7 +75,8 @@ public class TestImportRawBlock implements JsonRpcMethod {
           requestContext.getRequest().getId(), block.getHash().toString());
     } else {
       LOG.debug("Failed to import block.");
-      return new JsonRpcSuccessResponse(requestContext.getRequest().getId(), "0x");
+      return new JsonRpcErrorResponse(
+          requestContext.getRequest().getId(), JsonRpcError.BLOCK_IMPORT_ERROR);
     }
   }
 }
diff --git a/ethereum/retesteth/src/test/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlockTest.java b/ethereum/retesteth/src/test/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlockTest.java
new file mode 100644
index 0000000000..040cd8813b
--- /dev/null
+++ b/ethereum/retesteth/src/test/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlockTest.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ */
+
+package org.hyperledger.besu.ethereum.retesteth.methods;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequest;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcError;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcResponseType;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
+import org.hyperledger.besu.ethereum.retesteth.RetestethContext;
+
+import java.io.IOException;
+
+import com.google.common.base.Charsets;
+import com.google.common.io.Resources;
+import io.vertx.core.json.JsonObject;
+import org.junit.Before;
+import org.junit.Test;
+
+public class TestImportRawBlockTest {
+  private TestImportRawBlock test_importRawBlock;
+
+  @Before
+  public void setupClass() throws IOException {
+    final RetestethContext context = new RetestethContext();
+    test_importRawBlock = new TestImportRawBlock(context);
+    final TestSetChainParams test_setChainParams = new TestSetChainParams(context);
+    final String chainParamsJsonString =
+        Resources.toString(
+            TestSetChainParamsTest.class.getResource("multimpleBalanceInstructionChainParams.json"),
+            Charsets.UTF_8);
+    final JsonObject chainParamsJson = new JsonObject(chainParamsJsonString);
+
+    final JsonRpcRequestContext request =
+        new JsonRpcRequestContext(
+            new JsonRpcRequest(
+                "2.0", TestSetChainParams.METHOD_NAME, new Object[] {chainParamsJson.getMap()}));
+
+    assertThat(test_setChainParams.response(request))
+        .isEqualTo(new JsonRpcSuccessResponse(null, true));
+  }
+
+  @Test
+  public void testMissingParent() {
+    final String rawBlockRLPString =
+        "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";
+
+    final JsonRpcRequestContext request =
+        new JsonRpcRequestContext(
+            new JsonRpcRequest(
+                "2.0", TestImportRawBlock.METHOD_NAME, new Object[] {rawBlockRLPString}));
+
+    final var response = test_importRawBlock.response(request);
+    assertThat(response.getType()).isEqualTo(JsonRpcResponseType.ERROR);
+    assertThat(((JsonRpcErrorResponse) response).getError())
+        .isEqualTo(JsonRpcError.BLOCK_IMPORT_ERROR);
+  }
+
+  @Test
+  public void testBadBlock() {
+    final String rawBlockRLPString = "0xf9045df901f9a08";
+
+    final JsonRpcRequestContext request =
+        new JsonRpcRequestContext(
+            new JsonRpcRequest(
+                "2.0", TestImportRawBlock.METHOD_NAME, new Object[] {rawBlockRLPString}));
+
+    final var response = test_importRawBlock.response(request);
+    assertThat(response.getType()).isEqualTo(JsonRpcResponseType.ERROR);
+    assertThat(((JsonRpcErrorResponse) response).getError())
+        .isEqualTo(JsonRpcError.BLOCK_RLP_IMPORT_ERROR);
+  }
+
+  @Test
+  public void testGoodBlock() {
+    final String rawBlockRLPString =
+        "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";
+
+    final JsonRpcRequestContext request =
+        new JsonRpcRequestContext(
+            new JsonRpcRequest(
+                "2.0", TestImportRawBlock.METHOD_NAME, new Object[] {rawBlockRLPString}));
+
+    final var response = test_importRawBlock.response(request);
+    assertThat(response.getType()).isEqualTo(JsonRpcResponseType.SUCCESS);
+  }
+}