diff --git a/Makefile b/Makefile
index f5e73c2..8aabf8c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-SHELL := /bin/bash
+SHELL = /bin/bash
 
 # Load environment variables from .env file
 include .env
@@ -34,10 +34,10 @@ build: node_modules
 .SILENT: install
 install: build
 	dfx canister install identity --argument '(null)' --mode reinstall --yes
-	$(shell make/install_ledger.sh)
-	$(shell make/install_ledger_index.sh)
+	./make/install_ledger.sh
+	./make/install_ledger_index.sh
 	dfx canister install github --mode reinstall --yes
-	$(shell make/install_bounty.sh)
+	./make/install_bounty.sh
 
 .PHONY: upgrade
 .SILENT: upgrade
@@ -114,4 +114,4 @@ test-a: install
 .PHONY: test-deposit
 .SILENT: test-deposit
 test-deposit: install
-	$(shell make/test/deposit.sh)
+	./make/test/deposit.sh | grep "PASS"
diff --git a/make/test/deposit.sh b/make/test/deposit.sh
index 67bbf25..c5a2568 100755
--- a/make/test/deposit.sh
+++ b/make/test/deposit.sh
@@ -3,15 +3,17 @@
 set -e
 
 balance_of() {
-    dfx canister call icrc1_index icrc1_balance_of "(record{owner = principal \"$1\"; })"
+    dfx canister call --output=json icrc1_index icrc1_balance_of \
+        "(record{owner = principal \"$1\"; })"
 }
 
 approve_allowance() {
-    dfx canister call icrc1_ledger icrc2_approve "(record { amount = $1; spender = record{owner = principal \"$2\";} })"
+    dfx canister call --output=json icrc1_ledger icrc2_approve \
+        "(record { amount = $1; spender = record{owner = principal \"$2\";} })"
 }
 
 deposit() {
-    dfx canister call bounty deposit "()"
+    dfx canister call --output=json bounty deposit "()"
 }
 
 CALLER=$(dfx identity get-principal)
@@ -21,13 +23,16 @@ BOUNTY=$(dfx canister id bounty)
 echo "Calling deposit on bounty canister..."
 
 # check initial balances
-echo "Caller initial balance: $(balance_of "$CALLER")"
-echo "Bounty initial balance: $(balance_of "$BOUNTY")"
+echo "Caller initial balance: $(balance_of $CALLER)"
+echo "Bounty initial balance: $(balance_of $BOUNTY)"
 
 # deposit
-echo "Bounty allowance: $(approve_allowance 100_000 "$BOUNTY")"
+echo "Bounty allowance: $(approve_allowance 100_000 $BOUNTY)"
 echo "Bounty deposit: $(deposit)"
 
 # check final balances
-echo "Caller final balance: $(balance_of "$CALLER")"
-echo "Bounty final balance: $(balance_of "$BOUNTY")"
+sleep 1
+echo "Caller final balance: $(balance_of $CALLER)"
+echo "Bounty final balance: $(balance_of $BOUNTY)"
+
+echo "PASS"