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diff --git a/devtools/client/inspector/animation/test/browser_animation_logic_auto-stop.js b/devtools/client/inspector/animation/test/browser_animation_logic_auto-stop.js
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+++ b/devtools/client/inspector/animation/test/browser_animation_logic_auto-stop.js
@@ -0,0 +1,94 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Animation inspector makes the current time to stop
+// after end of animation duration except iterations infinity.
+// Test followings:
+// * state of animations and UI components after end of animation duration
+// * state of animations and UI components after end of animation duration
+//   but iteration count is infinity
+
+add_task(async function () {
+  await addTab(URL_ROOT + "doc_simple_animation.html");
+  await removeAnimatedElementsExcept([".compositor-all", ".long"]);
+  const { animationInspector, inspector, panel } =
+    await openAnimationInspector();
+
+  info("Checking state after end of animation duration");
+  await selectNode(".long", inspector);
+  await waitUntil(() => panel.querySelectorAll(".animation-item").length === 1);
+  const pixelsData = getDurationAndRate(animationInspector, panel, 5);
+  clickOnCurrentTimeScrubberController(
+    animationInspector,
+    panel,
+    1 - pixelsData.rate
+  );
+  await waitUntilAnimationsPlayState(animationInspector, "paused");
+  clickOnPauseResumeButton(animationInspector, panel);
+  await assertStates(animationInspector, panel, false);
+
+  info(
+    "Checking state after end of animation duration and infinity iterations"
+  );
+  clickOnPauseResumeButton(animationInspector, panel);
+  await waitUntilAnimationsPlayState(animationInspector, "paused");
+  await selectNode(".compositor-all", inspector);
+  await waitUntil(() => panel.querySelectorAll(".animation-item").length === 1);
+  clickOnCurrentTimeScrubberController(animationInspector, panel, 1);
+  await waitUntilAnimationsPlayState(animationInspector, "paused");
+  clickOnPauseResumeButton(animationInspector, panel);
+  await assertStates(animationInspector, panel, true);
+});
+
+async function assertStates(animationInspector, panel, shouldRunning) {
+  const buttonEl = panel.querySelector(".pause-resume-button");
+  const labelEl = panel.querySelector(".current-time-label");
+  const scrubberEl = panel.querySelector(".current-time-scrubber");
+
+  const previousLabelContent = labelEl.textContent;
+  const previousScrubberX = scrubberEl.getBoundingClientRect().x;
+
+  await waitUntilAnimationsPlayState(
+    animationInspector,
+    shouldRunning ? "running" : "paused"
+  );
+
+  const currentLabelContent = labelEl.textContent;
+  const currentScrubberX = scrubberEl.getBoundingClientRect().x;
+
+  if (shouldRunning) {
+    isnot(
+      previousLabelContent,
+      currentLabelContent,
+      "Current time label content should change"
+    );
+    isnot(
+      previousScrubberX,
+      currentScrubberX,
+      "Current time scrubber position should change"
+    );
+    ok(
+      !buttonEl.classList.contains("paused"),
+      "State of button should be running"
+    );
+    assertAnimationsRunning(animationInspector);
+  } else {
+    is(
+      previousLabelContent,
+      currentLabelContent,
+      "Current time label Content should not change"
+    );
+    is(
+      previousScrubberX,
+      currentScrubberX,
+      "Current time scrubber position should not change"
+    );
+    ok(
+      buttonEl.classList.contains("paused"),
+      "State of button should be paused"
+    );
+    assertAnimationsPausing(animationInspector);
+  }
+}