diff --git a/buildSrc/src/main/kotlin/ort-kotlin-conventions.gradle.kts b/buildSrc/src/main/kotlin/ort-kotlin-conventions.gradle.kts
index 18a9a20bcaa37..9a2a466e7d9a5 100644
--- a/buildSrc/src/main/kotlin/ort-kotlin-conventions.gradle.kts
+++ b/buildSrc/src/main/kotlin/ort-kotlin-conventions.gradle.kts
@@ -61,6 +61,7 @@ testing {
                 implementation(project(":utils:test-utils"))
 
                 implementation(libs.kotest.assertions.core)
+                implementation(libs.kotest.property)
                 implementation(libs.kotest.runner.junit5)
             }
         }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 72100c47b67ca..c0323e27a2afe 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -133,6 +133,7 @@ kotest-extensions = { module = "io.kotest:kotest-extensions", version.ref = "kot
 kotest-extensions-junitXml = { module = "io.kotest:kotest-extensions-junitxml", version.ref = "kotest" }
 kotest-framework-datatest = { module = "io.kotest:kotest-framework-datatest", version.ref = "kotest" }
 kotest-framework-engine = { module = "io.kotest:kotest-framework-engine", version.ref = "kotest" }
+kotest-property = { module = "io.kotest:kotest-property", version.ref = "kotest" }
 kotest-runner-junit5 = { module = "io.kotest:kotest-runner-junit5", version.ref = "kotest" }
 kotlinpoet = { module = "com.squareup:kotlinpoet", version.ref = "kotlinPoet"}
 kotlinpoet-ksp = { module = "com.squareup:kotlinpoet-ksp", version.ref = "kotlinPoet"}
diff --git a/plugins/package-managers/composer/src/funTest/kotlin/ComposerFunTest.kt b/plugins/package-managers/composer/src/funTest/kotlin/ComposerFunTest.kt
index 05263066ba6eb..c708c72392720 100644
--- a/plugins/package-managers/composer/src/funTest/kotlin/ComposerFunTest.kt
+++ b/plugins/package-managers/composer/src/funTest/kotlin/ComposerFunTest.kt
@@ -26,6 +26,9 @@ import io.kotest.matchers.collections.shouldHaveSize
 import io.kotest.matchers.should
 import io.kotest.matchers.shouldBe
 import io.kotest.matchers.string.haveSubstring
+import io.kotest.property.Arb
+import io.kotest.property.arbitrary.file
+import io.kotest.property.arbitrary.single
 
 import java.io.File
 
@@ -39,7 +42,7 @@ import org.ossreviewtoolkit.utils.test.matchExpectedResult
 class ComposerFunTest : StringSpec({
     "Project files from vendor directories are ignored" {
         val projectFiles = ComposerFactory.create().mapDefinitionFiles(
-            File("."),
+            Arb.file().single(),
             listOf(
                 "projectA/composer.json",
                 "projectA/vendor/dependency1/composer.json",