diff --git a/opencdc/metadata_test.go b/opencdc/metadata_test.go
new file mode 100644
index 0000000..4ba4893
--- /dev/null
+++ b/opencdc/metadata_test.go
@@ -0,0 +1,38 @@
+// Copyright © 2023 Meroxa, Inc.
+//
+// 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.
+
+package opencdc
+
+import (
+	"testing"
+
+	opencdcv1 "github.com/conduitio/conduit-commons/proto/opencdc/v1"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+func TestMetadataConstants(t *testing.T) {
+	wantMapping := map[string]*protoimpl.ExtensionInfo{
+		OpenCDCVersion:         opencdcv1.E_OpencdcVersion,
+		MetadataOpenCDCVersion: opencdcv1.E_MetadataVersion,
+		MetadataCreatedAt:      opencdcv1.E_MetadataCreatedAt,
+		MetadataReadAt:         opencdcv1.E_MetadataReadAt,
+	}
+	for goConstant, extensionInfo := range wantMapping {
+		protoConstant := proto.GetExtension(extensionInfo.TypeDescriptor().ParentFile().Options(), extensionInfo)
+		if goConstant != protoConstant {
+			t.Fatalf("go constant %q doesn't match proto constant %q", goConstant, protoConstant)
+		}
+	}
+}