diff --git a/cmd/zetaclientd/start.go b/cmd/zetaclientd/start.go
index 56c074640a..3546cec8ad 100644
--- a/cmd/zetaclientd/start.go
+++ b/cmd/zetaclientd/start.go
@@ -144,7 +144,7 @@ func start(_ *cobra.Command, _ []string) error {
 	startLogger.Debug().Msgf("CreateAuthzSigner is ready")
 
 	// Initialize core parameters from zetacore
-	appContext := context.New(cfg, logger.Std)
+	appContext := context.New(cfg, masterLogger)
 	err = zetacoreClient.UpdateZetacoreContext(appContext, true, startLogger)
 	if err != nil {
 		startLogger.Error().Err(err).Msg("Error getting core parameters")
diff --git a/zetaclient/chains/base/observer.go b/zetaclient/chains/base/observer.go
index 6974dc3417..edfef83629 100644
--- a/zetaclient/chains/base/observer.go
+++ b/zetaclient/chains/base/observer.go
@@ -45,6 +45,7 @@ type Observer struct {
 	// chainParams contains the dynamic chain parameters of the observed chain
 	chainParams observertypes.ChainParams
 
+	// appContext contains context data for zetaclient & zetacore (e.g. supported chains)
 	appContext *context.AppContext
 
 	// zetacoreClient is the client to interact with ZetaChain
diff --git a/zetaclient/chains/base/observer_test.go b/zetaclient/chains/base/observer_test.go
index 72785cd130..e6d5a088a9 100644
--- a/zetaclient/chains/base/observer_test.go
+++ b/zetaclient/chains/base/observer_test.go
@@ -26,7 +26,7 @@ func createObserver(t *testing.T) *base.Observer {
 	// constructor parameters
 	chain := chains.Ethereum
 	chainParams := *sample.ChainParams(chain.ChainId)
-	zetacoreContext := context.New(config.NewConfig(), zerolog.Nop())
+	appContext := context.New(config.NewConfig(), zerolog.Nop())
 	zetacoreClient := mocks.NewMockZetacoreClient()
 	tss := mocks.NewTSSMainnet()
 
@@ -35,7 +35,7 @@ func createObserver(t *testing.T) *base.Observer {
 	ob, err := base.NewObserver(
 		chain,
 		chainParams,
-		zetacoreContext,
+		appContext,
 		zetacoreClient,
 		tss,
 		base.DefaultBlockCacheSize,