diff --git a/build.gradle b/build.gradle
index c1e2ff0a..8da9449b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -41,7 +41,8 @@ allprojects {
 
 configure(subprojects - project(':android')) {
   apply plugin: 'java-library'
-  sourceCompatibility = 7.0
+  sourceCompatibility = JavaVersion.VERSION_1_8
+  targetCompatibility = JavaVersion.VERSION_1_8
   compileJava {
     options.incremental = true
   }
diff --git a/core/build.gradle b/core/build.gradle
index dee4a47f..ceada6bf 100644
--- a/core/build.gradle
+++ b/core/build.gradle
@@ -102,11 +102,6 @@ dependencies {
   //api "net.mostlyoriginal.artemis-odb:contrib-plugin-singleton:$artemisContribVersion"
 }
 
-compileTestJava {
-  sourceCompatibility = "1.8"
-  targetCompatibility = "1.8"
-}
-
 dependencies {
   testImplementation platform('org.junit:junit-bom:5.7.1')
   testImplementation 'org.junit.jupiter:junit-jupiter'