diff --git a/web/cashtab/src/hooks/__tests__/migrations.test.js b/web/cashtab/src/hooks/__tests__/migrations.test.js
new file mode 100644
--- /dev/null
+++ b/web/cashtab/src/hooks/__tests__/migrations.test.js
@@ -0,0 +1,10 @@
+import { currency } from '../../components/Common/Ticker';
+import BigNumber from 'bignumber.js';
+
+describe('Testing functions for upgrading Cashtab', () => {
+    it('Replacement currency.dust parameter parsing matches legacy DUST parameter', () => {
+        expect(parseFloat(new BigNumber(currency.dust).toFixed(8))).toBe(
+            0.00000546,
+        );
+    });
+});
diff --git a/web/cashtab/src/hooks/useBCH.js b/web/cashtab/src/hooks/useBCH.js
--- a/web/cashtab/src/hooks/useBCH.js
+++ b/web/cashtab/src/hooks/useBCH.js
@@ -3,7 +3,6 @@
 import SlpWallet from 'minimal-slp-wallet';
 
 export default function useBCH() {
-    const DUST = 0.000005;
     const SEND_BCH_ERRORS = {
         INSUFICIENT_FUNDS: 0,
         NETWORK_ERROR: 1,
@@ -495,7 +494,12 @@
                 );
             }
 
-            if (remainder >= BCH.BitcoinCash.toSatoshi(DUST)) {
+            if (
+                remainder >=
+                BCH.BitcoinCash.toSatoshi(
+                    parseFloat(new BigNumber(currency.dust).toFixed(8)),
+                )
+            ) {
                 transactionBuilder.addOutput(REMAINDER_ADDR, remainder);
             }