diff --git a/app/build.gradle b/app/build.gradle
index 79fa15691..7453610b7 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -590,7 +590,6 @@ dependencies {
     testImplementation Deps.mockito_core
     androidTestImplementation Deps.mockito_android
     testImplementation Deps.mockk
-    testImplementation Deps.assertk
 
     // For the initial release of Glean 19, we require consumer applications to
     // depend on a separate library for unit tests. This will be removed in future releases.
diff --git a/buildSrc/src/main/java/Dependencies.kt b/buildSrc/src/main/java/Dependencies.kt
index 3919e2d19..4936052ca 100644
--- a/buildSrc/src/main/java/Dependencies.kt
+++ b/buildSrc/src/main/java/Dependencies.kt
@@ -39,7 +39,6 @@ object Versions {
     const val junit = "5.5.2"
     const val mockito = "2.24.5"
     const val mockk = "1.9.kotlin12"
-    const val assertk = "0.19"
 
     const val mockwebserver = "3.11.0"
     const val uiautomator = "2.2.0"
@@ -177,7 +176,6 @@ object Deps {
     const val mockito_core = "org.mockito:mockito-core:${Versions.mockito}"
     const val mockito_android = "org.mockito:mockito-android:${Versions.mockito}"
     const val mockk = "io.mockk:mockk:${Versions.mockk}"
-    const val assertk = "com.willowtreeapps.assertk:assertk-jvm:${Versions.assertk}"
 
     // --- START AndroidX test dependencies --- //
     // N.B.: the versions of these dependencies appear to be pinned together. To avoid bugs, they