diff --git a/app/params/proto.go b/app/params/proto.go
index c499108e..f774759b 100644
--- a/app/params/proto.go
+++ b/app/params/proto.go
@@ -3,9 +3,15 @@ package params
 import (
 	"github.com/cosmos/cosmos-sdk/types/module"
 	"github.com/cosmos/cosmos-sdk/types/module/testutil"
+	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 )
 
 // MakeEncodingConfig creates an EncodingConfig for Amino-based tests.
 func MakeEncodingConfig(modules ...module.AppModuleBasic) testutil.TestEncodingConfig {
-	return testutil.MakeTestEncodingConfig(modules...)
+	encCfg := testutil.MakeTestEncodingConfig(modules...)
+
+	// register auth type interfaces
+	authtypes.RegisterInterfaces(encCfg.InterfaceRegistry)
+
+	return encCfg
 }