--- a/devtools/client/inspector/animation/test/browser.ini
+++ b/devtools/client/inspector/animation/test/browser.ini
@@ -7,16 +7,17 @@ support-files =
   head.js
   !/devtools/client/framework/test/shared-head.js
   !/devtools/client/inspector/test/head.js
   !/devtools/client/inspector/test/shared-head.js
   !/devtools/client/shared/test/test-actor-registry.js
   !/devtools/client/shared/test/test-actor.js
 
 [browser_animation_animated-property-list.js]
+[browser_animation_animated-property-name.js]
 [browser_animation_animation-detail_close-button.js]
 [browser_animation_animation-detail_title.js]
 [browser_animation_animation-detail_visibility.js]
 [browser_animation_animation-list.js]
 [browser_animation_animation-target.js]
 [browser_animation_animation-timeline-tick.js]
 [browser_animation_empty_on_invalid_nodes.js]
 [browser_animation_inspector_exists.js]

new file mode 100644
--- /dev/null
+++ b/devtools/client/inspector/animation/test/browser_animation_animated-property-name.js
@@ -0,0 +1,79 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test the following animated property name component features:
+// * name of property
+// * display compositor sign when the property was running on compositor.
+// * display warning when the property is runnable on compositor but was not.
+
+const TEST_DATA = [
+  {
+    property: "opacity",
+    isOnCompositor: true,
+  },
+  {
+    property: "transform",
+    isWarning: true,
+  },
+  {
+    property: "width",
+  },
+];
+
+add_task(async function () {
+  await addTab(URL_ROOT + "doc_simple_animation.html");
+  const { inspector, panel } = await openAnimationInspector();
+
+  info("Checking animated property name component");
+  await selectNodeAndWaitForAnimations(".compositor-notall", inspector);
+
+  const animatedPropertyNameEls = panel.querySelectorAll(".animated-property-name");
+  is(animatedPropertyNameEls.length, TEST_DATA.length,
+    `Number of animated property name elements should be ${ TEST_DATA.length }`);
+
+  for (const [index, animatedPropertyNameEl] of animatedPropertyNameEls.entries()) {
+    const testData = TEST_DATA[index];
+
+    info(`Checking text content for ${ testData.property }`);
+
+    const spanEl = animatedPropertyNameEl.querySelector("span");
+    ok(spanEl,
+      `<span> element should be in animated-property-name of ${ testData.property }`);
+    is(spanEl.textContent, testData.property,
+      `textContent should be ${ testData.property }`);
+
+    info(`Checking compositor sign for ${ testData.property }`);
+
+    if (testData.isOnCompositor) {
+      ok(animatedPropertyNameEl.classList.contains("compositor"),
+        "animatedPropertyNameEl should has .compositor class");
+      isnot(getComputedStyle(spanEl, "::before").width, "auto",
+        "width of ::before pseud should not be auto");
+    } else {
+      ok(!animatedPropertyNameEl.classList.contains("compositor"),
+        "animatedPropertyNameEl should not have .compositor class");
+      is(getComputedStyle(spanEl, "::before").width, "auto",
+        "width of ::before pseud should be auto");
+    }
+
+    info(`Checking warning for ${ testData.property }`);
+
+    if (testData.isWarning) {
+      ok(animatedPropertyNameEl.classList.contains("warning"),
+        "animatedPropertyNameEl should has .warning class");
+      is(getComputedStyle(spanEl).textDecorationStyle, "dotted",
+        "text-decoration-style of spanEl should be 'dotted'");
+      is(getComputedStyle(spanEl).textDecorationLine, "underline",
+        "text-decoration-line of spanEl should be 'underline'");
+    } else {
+      ok(!animatedPropertyNameEl.classList.contains("warning"),
+        "animatedPropertyNameEl should not have .warning class");
+      is(getComputedStyle(spanEl).textDecorationStyle, "solid",
+        "text-decoration-style of spanEl should be 'solid'");
+      is(getComputedStyle(spanEl).textDecorationLine, "none",
+        "text-decoration-line of spanEl should be 'none'");
+    }
+  }
+});