diff --git a/scripts/install_pnpm.sh b/scripts/install_pnpm.sh
index 33aecdfc6..34ba47b07 100755
--- a/scripts/install_pnpm.sh
+++ b/scripts/install_pnpm.sh
@@ -3,6 +3,6 @@
 # Install pnpm
 if ! command -v pnpm &> /dev/null; then
     echo "pnpm is not installed, installing it now..."
-    curl -L https://unpkg.com/@pnpm/self-installer | node
+    npm i pnpm --global
 fi
 
diff --git a/tests/waku_rln_relay/utils_onchain.nim b/tests/waku_rln_relay/utils_onchain.nim
index e0b907a86..e5778d5d9 100644
--- a/tests/waku_rln_relay/utils_onchain.nim
+++ b/tests/waku_rln_relay/utils_onchain.nim
@@ -287,7 +287,7 @@ proc approveTokenAllowanceAndVerify*(
     tx.to = Opt.some(tokenAddress)
     tx.value = Opt.some(0.u256)
     tx.gasPrice = Opt.some(gasPrice)
-    tx.gas = Opt.some(Quantity(100000)) # Consider estimating gas instead
+    tx.gas = Opt.some(Quantity(100000))
     tx.data = Opt.some(byteutils.hexToSeqByte(approveCallData))
     tx.chainId = Opt.some(CHAIN_ID)
 
@@ -719,6 +719,7 @@ proc setupOnchainGroupManager*(
     testTokenAddress, # ERC20 token address
     contractAddress, # spender - the proxy contract that will spend the tokens
     ethToWei(200.u256),
+    some(0.u256) # expected allowance before approval
   )
 
   assert tokenApprovalResult.isOk, tokenApprovalResult.error()