diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index d79532006b..55a88c9929 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -27,6 +27,9 @@ poko = "dev.drewhamilton.poko:poko-gradle-plugin:0.15.2"
 # TODO: Update "renovate.json" once logback-classic is updated to 1.4 (once java8 support for ktlint is dropped)
 logback = "ch.qos.logback:logback-classic:1.3.14"
 logcaptor = "io.github.hakky54:logcaptor:2.9.2"
+# Required for logback-test.xml conditional configuration so that trace-logging in unit test can be automatically enabled using an
+# environment variable
+janino = "org.codehaus.janino:janino:3.1.11"
 # Testing libraries
 junit5 = "org.junit.jupiter:junit-jupiter:5.10.2"
 assertj = "org.assertj:assertj-core:3.25.3"
diff --git a/ktlint-test/build.gradle.kts b/ktlint-test/build.gradle.kts
index 2362226683..6262c050d4 100644
--- a/ktlint-test/build.gradle.kts
+++ b/ktlint-test/build.gradle.kts
@@ -8,5 +8,6 @@ dependencies {
     implementation(projects.ktlintCliRulesetCore)
     api(libs.assertj)
     api(libs.junit5)
+    api(libs.janino)
     api(libs.jimfs)
 }