diff --git a/build.gradle.kts b/build.gradle.kts
index be59d6a..5c5ef96 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -59,6 +59,7 @@ dependencies {
     // ↓ Classpath resource for MigrateTestNg* recipes
     testRuntimeOnly("org.testng:testng:7.5.1")  // 7.5.x is the last Java 8 compatible version: https://github.com/testng-team/testng/issues/2775
     testRuntime("org.junit.jupiter:junit-jupiter-api:latest.release")
+    testImplementation("org.apiguardian:apiguardian-api:latest.release")
 
     // ↓ to allow using testing recipes in our recipe list
     testRuntimeOnly("org.openrewrite.recipe:rewrite-testing-frameworks:latest.release") {