diff --git a/state/indexer/sink/psql/psql.go b/state/indexer/sink/psql/psql.go
index 8bd378f4a..574e5d0c1 100644
--- a/state/indexer/sink/psql/psql.go
+++ b/state/indexer/sink/psql/psql.go
@@ -16,8 +16,6 @@ import (
 	"github.com/tendermint/tendermint/types"
 )
 
-var _ indexer.EventSink = (*EventSink)(nil)
-
 const (
 	TableEventBlock = "block_events"
 	TableEventTx    = "tx_events"
diff --git a/state/indexer/sink/psql/psql_test.go b/state/indexer/sink/psql/psql_test.go
index 35ad7eea3..da9bd8d69 100644
--- a/state/indexer/sink/psql/psql_test.go
+++ b/state/indexer/sink/psql/psql_test.go
@@ -23,6 +23,9 @@ import (
 	"github.com/tendermint/tendermint/types"
 )
 
+// Verify that the type satisfies the EventSink interface.
+var _ indexer.EventSink = (*EventSink)(nil)
+
 var db *sql.DB
 var resource *dockertest.Resource
 var chainID = "test-chainID"