diff --git a/addons/xterm-addon-image/src/ImageStorage.ts b/addons/xterm-addon-image/src/ImageStorage.ts
index 9ce3fa82..97eef852 100644
--- a/addons/xterm-addon-image/src/ImageStorage.ts
+++ b/addons/xterm-addon-image/src/ImageStorage.ts
@@ -149,8 +149,8 @@ export class ImageStorage implements IDisposable {
   }
 
   public setLimit(value: number): void {
-    if (value < 1 || value > 1000) {
-      throw RangeError('invalid storageLimit, should be at least 1 MB and not exceed 1G');
+    if (value < 0.5 || value > 1000) {
+      throw RangeError('invalid storageLimit, should be at least 0.5 MB and not exceed 1G');
     }
     this._pixelLimit = (value / 4 * 1000000) >>> 0;
     this._evictOldest(0);
diff --git a/addons/xterm-addon-image/test/ImageAddon.api.ts b/addons/xterm-addon-image/test/ImageAddon.api.ts
index 34a2eee1..5b43eb35 100644
--- a/addons/xterm-addon-image/test/ImageAddon.api.ts
+++ b/addons/xterm-addon-image/test/ImageAddon.api.ts
@@ -222,11 +222,11 @@ describe('ImageAddon', () => {
       assert.equal(usage as number < 1, true);
     });
     it('set storageLimit removes images synchronously', async () => {
-      await writeToTerminal(SIXEL_SEQ_0 + SIXEL_SEQ_0 + SIXEL_SEQ_0 + SIXEL_SEQ_0 + SIXEL_SEQ_0 + SIXEL_SEQ_0);
+      await writeToTerminal(SIXEL_SEQ_0 + SIXEL_SEQ_0 + SIXEL_SEQ_0);
       const usage: number = await page.evaluate('imageAddon.storageUsage');
-      const newUsage: number = await page.evaluate('imageAddon.storageLimit = 1; imageAddon.storageUsage');
+      const newUsage: number = await page.evaluate('imageAddon.storageLimit = 0.5; imageAddon.storageUsage');
       assert.equal(newUsage < usage, true);
-      assert.equal(newUsage < 1, true);
+      assert.equal(newUsage < 0.5, true);
     });
     it('clear alternate images on buffer change', async () => {
       assert.equal(await page.evaluate('imageAddon.storageUsage'), 0);
@@ -236,6 +236,7 @@ describe('ImageAddon', () => {
       assert.equal(await page.evaluate('imageAddon.storageUsage'), 0);
     });
     it('evict tiles by in-place overwrites (only full overwrite tested)', async () => {
+      await new Promise(r => setTimeout(r, 50));
       await writeToTerminal('\x1b[H' + SIXEL_SEQ_0 + '\x1b[100;100H');
       let usage = await page.evaluate('imageAddon.storageUsage');
       while (usage === 0) {
@@ -243,8 +244,6 @@ describe('ImageAddon', () => {
         usage = await page.evaluate('imageAddon.storageUsage');
       }
       await writeToTerminal('\x1b[H' + SIXEL_SEQ_0 + '\x1b[100;100H');
-      await writeToTerminal('\x1b[H' + SIXEL_SEQ_0 + '\x1b[100;100H');
-      await writeToTerminal('\x1b[H' + SIXEL_SEQ_0 + '\x1b[100;100H');
       await new Promise(r => setTimeout(r, 200));  // wait some time and re-check
       assert.equal(await page.evaluate('imageAddon.storageUsage'), usage);
     });