diff --git a/package.json b/package.json
index 2bdb97d..0a5c29a 100644
--- a/package.json
+++ b/package.json
@@ -53,8 +53,8 @@
     "test-all": "jest --no-cache",
     "test-save": "SAVE=true npm run test-node",
     "test-watch": "npm run test-node -- --watch",
-    "test-node": "jest --no-cache ./test/Examples.spec.js",
-    "test-browser": "jest --no-cache ./test/Browser.spec.js",
+    "test-node": "node --expose-gc node_modules/.bin/jest --no-cache --runInBand ./test/Examples.spec.js",
+    "test-browser": "node --expose-gc node_modules/.bin/jest --no-cache --runInBand ./test/Browser.spec.js",
     "changelog": "conventional-changelog -i CHANGELOG.md -s -r",
     "release": "npm version --no-git-tag-version",
     "preversion": "git checkout master && npm run lint && SAVE=true npm run test-all",
diff --git a/test/ExampleWorker.js b/test/ExampleWorker.js
index ba13118..64285c2 100644
--- a/test/ExampleWorker.js
+++ b/test/ExampleWorker.js
@@ -30,6 +30,8 @@ const runExample = options => {
   const consoleOriginal = global.console;
   const logs = [];
 
+  global.gc();
+
   mock('matter-js', Matter);
   global.Matter = Matter;
 
diff --git a/test/Examples.spec.js b/test/Examples.spec.js
index dcc7e41..b20a0c9 100644
--- a/test/Examples.spec.js
+++ b/test/Examples.spec.js
@@ -30,7 +30,8 @@ const examples = Object.keys(Example).filter(key => {
 
 const runExamples = async useDev => {
     const worker = new Worker(require.resolve('./ExampleWorker'), {
-        enableWorkerThreads: true
+        enableWorkerThreads: true,
+        numWorkers: 1
     });
 
     const result = await Promise.all(examples.map(name => worker.runExample({
diff --git a/test/TestTools.js b/test/TestTools.js
index 129d70b..1b21767 100644
--- a/test/TestTools.js
+++ b/test/TestTools.js
@@ -256,9 +256,8 @@ const comparisonReport = (capturesDev, capturesBuild, buildVersion, save) => {
 
     let perfChange = 1 - (totalTimeDev / totalTimeBuild);
     
-    const perfChangeThreshold = 0.075;
-    const perfChangeLarge = Math.abs(perfChange) > perfChangeThreshold;
-    perfChange = perfChangeLarge ? perfChange : 0;
+    const perfChangeThreshold = 0.01;
+    perfChange = Math.abs(perfChange) > perfChangeThreshold ? perfChange : 0;
 
     let similarityAvg = 0;
     similarityEntries.forEach(([_, similarity]) => {
@@ -288,7 +287,7 @@ const comparisonReport = (capturesDev, capturesBuild, buildVersion, save) => {
             }
             return output;
         }, '\n\n'),
-        `\nwhere  · no change  ● extrinsics changed  ◆ intrinsics changed\n`,
+        `\n\nwhere  · no change  ● extrinsics changed  ◆ intrinsics changed\n`,
         similarityAvg < 1 ? `\n${format('▶', colors.White)} ${format(compareCommand + '=' + 120 + '#' + similarityEntries[0][0], colors.BrightCyan)}` : '',
         intrinsicChangeCount > 0 ? `\n${format('▶', colors.White)} ${format((save ? diffCommand : diffSaveCommand), colors.BrightCyan)}` : ''
     ].join('  ');