diff --git a/mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/GeckoSessionTestRuleTest.kt b/mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/GeckoSessionTestRuleTest.kt
index 1812c22350a4..0a2c64298717 100644
--- a/mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/GeckoSessionTestRuleTest.kt
+++ b/mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/GeckoSessionTestRuleTest.kt
@@ -1532,8 +1532,6 @@ class GeckoSessionTestRuleTest : BaseSessionTest(noErrorCollector = true) {
 
     @TimeoutMillis(1000)
     @Test(expected = UiThreadUtils.TimeoutException::class)
-        // disable test on debug for frequently failing Bug 1605001
-        assumeThat(sessionRule.env.isDebugBuild, equalTo(false))
     fun evaluateJS_canTimeout() {
         mainSession.loadTestPath(HELLO_HTML_PATH)
         mainSession.waitForPageStop()