diff --git a/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-kotlinVersionPropertyIsSet.gradle b/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-kotlinVersionPropertyIsSet.gradle
index acbd258d418..0c4896ced88 100644
--- a/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-kotlinVersionPropertyIsSet.gradle
+++ b/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-kotlinVersionPropertyIsSet.gradle
@@ -43,9 +43,8 @@ dependencies {
 }
 
 tasks.register("kotlinVersion") {
-	def properties = project.properties
+	def kotlinVersion = project.findProperty('kotlin.version') ?: 'none'
 	doLast {
-		def kotlinVersion = properties.getOrDefault('kotlin.version', 'none')
 		println "Kotlin version: ${kotlinVersion}"
 	}
 }
diff --git a/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-noKotlinVersionPropertyWithoutKotlinPlugin.gradle b/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-noKotlinVersionPropertyWithoutKotlinPlugin.gradle
index ae83008f9ce..c031136d4fd 100644
--- a/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-noKotlinVersionPropertyWithoutKotlinPlugin.gradle
+++ b/build-plugin/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/KotlinPluginActionIntegrationTests-noKotlinVersionPropertyWithoutKotlinPlugin.gradle
@@ -19,9 +19,8 @@ plugins {
 }
 
 tasks.register("kotlinVersion") {
-	def properties = project.properties
+	def kotlinVersion = project.findProperty('kotlin.version') ?: 'none'
 	doLast {
-		def kotlinVersion = properties.getOrDefault('kotlin.version', 'none')
 		println "Kotlin version: ${kotlinVersion}"
 	}
 }