diff --git a/.github/workflows/dev.yml b/.github/workflows/main.yml
similarity index 99%
rename from .github/workflows/dev.yml
rename to .github/workflows/main.yml
index a0b86dc..33c17b8 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/main.yml
@@ -1,4 +1,4 @@
-name: Dev
+name: Main
 
 on:
   push:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bb837f6..8de1026 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -2,6 +2,8 @@ name: Test
 
 on:
   push:
+    branches-ignore:
+      - master
 
 jobs:
   publish:
diff --git a/src/util.ts b/src/util.ts
index 042e373..fb59a6a 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -360,12 +360,17 @@ export async function getEstimates(): Promise<Estimates> {
   const bitcoindFeeEstimates = getValueFromFulfilledPromise(result3);
   const blocksTipHash = getValueFromFulfilledPromise(result4);
 
+  // Get the minimum fee. If the mempool fee estimates are not available, use a default value of FEE_MINIMUM sat/vbyte as a safety net.
+  const feeMinimum = (mempoolFeeEstimates?.minimumFee ?? FEE_MINIMUM) * 1000;
+  log.info({ message: "Using minimum fee: {feeMinimum}", feeMinimum });
+
   estimates = {
     current_block_hash: blocksTipHash,
     fee_by_block_target: calculateFees(
       mempoolFeeEstimates,
       esploraFeeEstimates,
       bitcoindFeeEstimates,
+      feeMinimum,
     ),
   };
 
@@ -380,6 +385,7 @@ export async function getEstimates(): Promise<Estimates> {
  */
 export function extractMempoolFees(
   mempoolFeeEstimates: MempoolFeeEstimates,
+  depth: number,
 ): FeeByBlockTarget {
   const feeByBlockTarget: FeeByBlockTarget = {};
 
@@ -389,7 +395,7 @@ export function extractMempoolFees(
       3: "halfHourFee",
       6: "hourFee",
     };
-    for (let i = 1; i <= MEMPOOL_DEPTH; i++) {
+    for (let i = 1; i <= depth; i++) {
       const feeProperty = blockTargetMapping[i];
       if (feeProperty && mempoolFeeEstimates[feeProperty]) {
         feeByBlockTarget[i] = mempoolFeeEstimates[feeProperty];
@@ -469,12 +475,13 @@ export function calculateFees(
   mempoolFeeEstimates: MempoolFeeEstimates,
   esploraFeeEstimates: FeeByBlockTarget,
   bitcoindFeeEstimates: FeeByBlockTarget,
+  feeMinimum: number,
 ) {
   let feeByBlockTarget: FeeByBlockTarget = {};
 
   // Get the mempool fee estimates.
   if (mempoolFeeEstimates) {
-    let estimates = extractMempoolFees(mempoolFeeEstimates);
+    let estimates = extractMempoolFees(mempoolFeeEstimates, MEMPOOL_DEPTH);
     estimates = processEstimates(estimates, true, true);
     addFeeEstimates(feeByBlockTarget, estimates);
   }
@@ -491,12 +498,8 @@ export function calculateFees(
     addFeeEstimates(feeByBlockTarget, estimates);
   }
 
-  // Get the minimum fee. If the mempool fee estimates are not available, use a default value of FEE_MINIMUM sat/vbyte as a safety net.
-  const minFee = (mempoolFeeEstimates?.minimumFee ?? FEE_MINIMUM) * 1000;
-  log.info({ message: "Using minimum fee: {minFee}", minFee });
-
   // Filter the estimates to remove any that are lower than the desired minimum fee.
-  feeByBlockTarget = filterEstimates(feeByBlockTarget, minFee);
+  feeByBlockTarget = filterEstimates(feeByBlockTarget, feeMinimum);
 
   return feeByBlockTarget;
 }
diff --git a/test/unit.test.ts b/test/unit.test.ts
index 03c57b4..5c7e4f0 100644
--- a/test/unit.test.ts
+++ b/test/unit.test.ts
@@ -1,14 +1,89 @@
 import { expect, test } from "bun:test";
-import { addFeeEstimates } from "../src/util";
+import {
+  addFeeEstimates,
+  filterEstimates,
+  extractMempoolFees,
+  calculateFees,
+} from "../src/util";
 
+// Define test data
+const mempoolFeeEstimates: MempoolFeeEstimates = {
+  fastestFee: 500,
+  halfHourFee: 400,
+  hourFee: 300,
+  economyFee: 200,
+  minimumFee: 100,
+};
+const bitcoindFeeEstimates: FeeByBlockTarget = {
+  1: 300000,
+  10: 250000,
+  20: 200000,
+};
+const esploraFeeEstimates: FeeByBlockTarget = {
+  10: 400000,
+  20: 300000,
+  30: 150000,
+};
+
+// Test addFeeEstimates function
 test("addFeeEstimates", () => {
-  const feeByBlockTarget: FeeByBlockTarget = { 1: 100, 2: 200, 3: 300 };
-  const newEstimates: FeeByBlockTarget = { 4: 50, 5: 150, 6: 250 };
+  const feeByBlockTarget: FeeByBlockTarget = { 1: 500, 2: 400, 3: 300 };
+  const newEstimates: FeeByBlockTarget = { 4: 320, 5: 300, 6: 250 };
 
   addFeeEstimates(feeByBlockTarget, newEstimates);
 
-  expect(feeByBlockTarget[4]).toEqual(50);
+  expect(feeByBlockTarget[1]).toEqual(500);
+  expect(feeByBlockTarget[2]).toEqual(400);
+  expect(feeByBlockTarget[3]).toEqual(300);
+  expect(feeByBlockTarget[4]).toBeUndefined();
   expect(feeByBlockTarget[5]).toBeUndefined();
-  expect(feeByBlockTarget[6]).toBeUndefined();
+  expect(feeByBlockTarget[6]).toEqual(250);
   expect(Object.keys(feeByBlockTarget).length).toEqual(4);
 });
+
+// Test filterEstimates function
+test("filterEstimates", () => {
+  const feeByBlockTarget: FeeByBlockTarget = { 1: 500, 2: 400, 3: 300 };
+  const feeMinimum = 350;
+
+  const result = filterEstimates(feeByBlockTarget, feeMinimum);
+
+  expect(result[1]).toEqual(500);
+  expect(result[2]).toEqual(400);
+  expect(result[3]).toBeUndefined();
+  expect(Object.keys(result).length).toEqual(2);
+});
+
+// Test extractMempoolFees function
+test("extractMempoolFees", () => {
+  const depth = 3;
+
+  const result: FeeByBlockTarget = extractMempoolFees(
+    mempoolFeeEstimates,
+    depth,
+  );
+
+  expect(result[1]).toEqual(500);
+  expect(result[3]).toEqual(400);
+  expect(result[6]).toBeUndefined();
+});
+
+// Test calculateFees function
+test("calculateFees", () => {
+  const result: FeeByBlockTarget = calculateFees(
+    mempoolFeeEstimates,
+    esploraFeeEstimates,
+    bitcoindFeeEstimates,
+    20000,
+  );
+
+  expect(result[1]).toEqual(500000);
+  expect(result[2]).toBeUndefined();
+  expect(result[3]).toEqual(400000);
+  expect(result[4]).toBeUndefined();
+  expect(result[6]).toEqual(300000);
+  expect(result[10]).toEqual(250000);
+  expect(result[20]).toEqual(200000);
+  expect(result[30]).toBeUndefined();
+  expect(Object.keys(result).length).toEqual(5);
+});