diff --git a/apps/explorer/lib/explorer/chain/credit.ex b/apps/explorer/lib/explorer/chain/credit.ex
index 1477ca91a9..ede5471c92 100644
--- a/apps/explorer/lib/explorer/chain/credit.ex
+++ b/apps/explorer/lib/explorer/chain/credit.ex
@@ -22,6 +22,4 @@ defmodule Explorer.Chain.Credit do
   def refresh do
     SQL.query!(Repo, "REFRESH MATERIALIZED VIEW CONCURRENTLY credits;", [], timeout: 120_000)
   end
-
-  def null, do: %__MODULE__{value: Decimal.new(0), count: 0}
 end
diff --git a/apps/explorer/lib/explorer/chain/debit.ex b/apps/explorer/lib/explorer/chain/debit.ex
index 0f709c081d..de6c7f6ed4 100644
--- a/apps/explorer/lib/explorer/chain/debit.ex
+++ b/apps/explorer/lib/explorer/chain/debit.ex
@@ -22,6 +22,4 @@ defmodule Explorer.Chain.Debit do
   def refresh do
     SQL.query!(Repo, "REFRESH MATERIALIZED VIEW CONCURRENTLY debits;", [], timeout: 120_000)
   end
-
-  def null, do: %__MODULE__{value: Decimal.new(0), count: 0}
 end
diff --git a/apps/explorer/lib/explorer/chain/internal_transaction.ex b/apps/explorer/lib/explorer/chain/internal_transaction.ex
index c3eb25aea9..1775f65305 100644
--- a/apps/explorer/lib/explorer/chain/internal_transaction.ex
+++ b/apps/explorer/lib/explorer/chain/internal_transaction.ex
@@ -35,6 +35,4 @@ defmodule Explorer.Chain.InternalTransaction do
     |> foreign_key_constraint(:from_address_id)
     |> unique_constraint(:transaction_id, name: :internal_transactions_transaction_id_index_index)
   end
-
-  def null, do: %__MODULE__{}
 end
diff --git a/coveralls.json b/coveralls.json
index 4b1f26482a..688f929e28 100644
--- a/coveralls.json
+++ b/coveralls.json
@@ -1,7 +1,7 @@
 {
   "coverage_options": {
     "treat_no_relevant_lines_as_covered": true,
-    "minimum_coverage": 77.8
+    "minimum_coverage": 83.2
   },
   "terminal_options": {
     "file_column_width": 120