diff --git a/addons/xterm-addon-fit/test/FitAddon.api.ts b/addons/xterm-addon-fit/test/FitAddon.api.ts
index c35673cc..caf8cc7d 100644
--- a/addons/xterm-addon-fit/test/FitAddon.api.ts
+++ b/addons/xterm-addon-fit/test/FitAddon.api.ts
@@ -48,7 +48,8 @@ describe('FitAddon', () => {
     it('default', async function(): Promise<any> {
       await loadFit();
       const dimensions: {cols: number, rows: number} = await page.evaluate(`window.fit.proposeDimensions()`);
-      assert.equal(dimensions.cols, 86);
+      assert.isAbove(dimensions.cols, 86);
+      assert.isBelow(dimensions.cols, 87);
       assert.isAbove(dimensions.rows, 24);
       assert.isBelow(dimensions.rows, 29);
     });
@@ -56,7 +57,8 @@ describe('FitAddon', () => {
     it('width', async function(): Promise<any> {
       await loadFit(1008);
       const dimensions: {cols: number, rows: number} = await page.evaluate(`window.fit.proposeDimensions()`);
-      assert.equal(dimensions.cols, 109);
+      assert.isAbove(dimensions.cols, 109);
+      assert.isBelow(dimensions.cols, 110);
       assert.isAbove(dimensions.rows, 24);
       assert.isBelow(dimensions.rows, 29);
     });
@@ -89,7 +91,8 @@ describe('FitAddon', () => {
       await page.evaluate(`window.fit.fit()`);
       const cols: number = await page.evaluate(`window.term.cols`);
       const rows: number = await page.evaluate(`window.term.rows`);
-      assert.equal(cols, 86);
+      assert.isAbove(cols, 86);
+      assert.isBelow(cols, 87);
       assert.isAbove(rows, 24);
       assert.isBelow(rows, 29);
     });
@@ -99,7 +102,8 @@ describe('FitAddon', () => {
       await page.evaluate(`window.fit.fit()`);
       const cols: number = await page.evaluate(`window.term.cols`);
       const rows: number = await page.evaluate(`window.term.rows`);
-      assert.equal(cols, 109);
+      assert.isAbove(cols, 109);
+      assert.isBelow(cols, 110);
       assert.isAbove(rows, 24);
       assert.isBelow(rows, 29);
     });