diff --git a/annotation/compiler/test/build.gradle b/annotation/compiler/test/build.gradle
index 63c8404e33..5bb534de3d 100644
--- a/annotation/compiler/test/build.gradle
+++ b/annotation/compiler/test/build.gradle
@@ -46,3 +46,6 @@ task regenerateTestResources {
     }
 }
 regenerateTestResources.finalizedBy(test)
+
+test.maxParallelForks = 2
+
diff --git a/build.gradle b/build.gradle
index 58f0505ac2..5b33833fdf 100644
--- a/build.gradle
+++ b/build.gradle
@@ -32,6 +32,7 @@ if (JavaVersion.current().isJava8Compatible()) {
 
 subprojects { project ->
     tasks.withType(JavaCompile) {
+        options.fork = true
         sourceCompatibility = 1.7
         targetCompatibility = 1.7
 
diff --git a/gradle.properties b/gradle.properties
index 54dbc42c25..1d1f415af0 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -42,5 +42,5 @@ COMPILE_SDK_VERSION=27
 TARGET_SDK_VERSION=27
 MIN_SDK_VERSION=14
 
-org.gradle.jvmargs=-Xmx2048M
-TEST_JVM_MEMORY_SIZE=2048M
+org.gradle.jvmargs=-Xmx4096M
+TEST_JVM_MEMORY_SIZE=4096M
diff --git a/library/build.gradle b/library/build.gradle
index fc9dfe2ccb..ddd3a7b208 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -33,6 +33,10 @@ android.testOptions.unitTests.all { Test testTask ->
         // Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=2048m; support was removed in 8.0
         testTask.jvmArgs "-XX:MaxPermSize=${TEST_JVM_MEMORY_SIZE}"
     }
+
+    // Initializing Robolectric is expensive, two threads seem to be around the only level where any
+    // improvement is seen.
+    testTask.maxParallelForks = 2
 }
 
 android {