diff --git a/runtime/types.go b/runtime/types.go
index afde0e42d1f8..4ae2774d5bee 100644
--- a/runtime/types.go
+++ b/runtime/types.go
@@ -3,7 +3,6 @@ package runtime
 import (
 	abci "github.com/cometbft/cometbft/abci/types"
 
-	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/server/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
@@ -17,10 +16,6 @@ type AppI interface {
 	// The assigned name of the app.
 	Name() string
 
-	// The application types codec.
-	// NOTE: This should NOT be sealed before being returned.
-	LegacyAmino() *codec.LegacyAmino
-
 	// Application updates every begin block.
 	BeginBlocker(ctx sdk.Context) (sdk.BeginBlock, error)
 
@@ -35,7 +30,12 @@ type AppI interface {
 
 	// Exports the state of the application for a genesis file.
 	ExportAppStateAndValidators(forZeroHeight bool, jailAllowedAddrs, modulesToExport []string) (types.ExportedApp, error)
+}
 
+// AppSimI implements the common methods for a Cosmos SDK-based application
+// specific blockchain that chooses to utilize the sdk simulation framework.
+type AppSimI interface {
+	AppI
 	// Helper for the simulation framework.
 	SimulationManager() *module.SimulationManager
 }
diff --git a/testutil/sims/simulation_helpers.go b/testutil/sims/simulation_helpers.go
index 1d4cbec4700f..04b12f0d7398 100644
--- a/testutil/sims/simulation_helpers.go
+++ b/testutil/sims/simulation_helpers.go
@@ -51,7 +51,7 @@ func SetupSimulation(config simtypes.Config, dirPrefix, dbName string, verbose,
 
 // SimulationOperations retrieves the simulation params from the provided file path
 // and returns all the modules weighted operations
-func SimulationOperations(app runtime.AppI, cdc codec.JSONCodec, config simtypes.Config) []simtypes.WeightedOperation {
+func SimulationOperations(app runtime.AppSimI, cdc codec.JSONCodec, config simtypes.Config) []simtypes.WeightedOperation {
 	simState := module.SimulationState{
 		AppParams: make(simtypes.AppParams),
 		Cdc:       cdc,
@@ -78,7 +78,7 @@ func SimulationOperations(app runtime.AppI, cdc codec.JSONCodec, config simtypes
 
 // CheckExportSimulation exports the app state and simulation parameters to JSON
 // if the export paths are defined.
-func CheckExportSimulation(app runtime.AppI, config simtypes.Config, params simtypes.Params) error {
+func CheckExportSimulation(app runtime.AppSimI, config simtypes.Config, params simtypes.Params) error {
 	if config.ExportStatePath != "" {
 		fmt.Println("exporting app state...")
 		exported, err := app.ExportAppStateAndValidators(false, nil, nil)