diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-butterknife/app/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-butterknife/app/build.gradle
index 0a09830ebe5..5a3e08a461d 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-butterknife/app/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-butterknife/app/build.gradle
@@ -21,6 +21,11 @@ android {
         }
     }
 
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/app/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/app/build.gradle
index 9b0ca4c359c..fc94b823dad 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/app/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/app/build.gradle
@@ -19,6 +19,12 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     dataBinding {
         enabled = true
     }
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/library/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/library/build.gradle
index fa765a9fb5d..4a791abcdfd 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/library/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-databinding/library/build.gradle
@@ -21,6 +21,11 @@ android {
         }
     }
 
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     dataBinding { enabled = true }
 }
 
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-dbflow/app/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-dbflow/app/build.gradle
index b15ce741c65..27c3398e09e 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-dbflow/app/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-dbflow/app/build.gradle
@@ -16,6 +16,11 @@ android {
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
+
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
 }
 
 def dbflow_version = "3.1.1"
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-realm/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-realm/build.gradle
index 310bc2c38c2..40f614d992d 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-realm/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-realm/build.gradle
@@ -43,6 +43,11 @@ android {
         incremental false
     }
 
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     packagingOptions {
         // Workaround for org.jetbrains.kotlin.gradle.Kapt3Android33IT#testRealm
         // Android Plugin 3.3.2 fails with:
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/androidx-navigation-safe-args/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/androidx-navigation-safe-args/build.gradle
index 9e3c9fe1de0..1c178948b0f 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/androidx-navigation-safe-args/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/androidx-navigation-safe-args/build.gradle
@@ -34,6 +34,11 @@ android {
         }
     }
 
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     dexOptions {
         incremental false
     }