diff --git a/.github/workflows/tests-smoke.yml b/.github/workflows/tests-smoke.yml
index 7a914284c4..c01793cf80 100644
--- a/.github/workflows/tests-smoke.yml
+++ b/.github/workflows/tests-smoke.yml
@@ -13,7 +13,7 @@ jobs:
   test-matrix:
     strategy:
       matrix:
-        os: [ ubuntu-latest, windows-latest ]
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/build-logic/src/main/kotlin/dokkabuild.java.gradle.kts b/build-logic/src/main/kotlin/dokkabuild.java.gradle.kts
index fb5605233e..a42029b5f8 100644
--- a/build-logic/src/main/kotlin/dokkabuild.java.gradle.kts
+++ b/build-logic/src/main/kotlin/dokkabuild.java.gradle.kts
@@ -20,11 +20,8 @@ java {
 tasks.withType<Test>().configureEach {
     useJUnitPlatform()
 
-    maxParallelForks = if (System.getenv("GITHUB_ACTIONS") != null) {
-        Runtime.getRuntime().availableProcessors()
-    } else {
-        (Runtime.getRuntime().availableProcessors() / 2).coerceAtLeast(1)
-    }
+    maxHeapSize = "1G"
+    maxParallelForks = (Runtime.getRuntime().availableProcessors() / 2).coerceAtLeast(1)
 
     javaLauncher = javaToolchains.launcherFor {
         languageVersion = dokkaBuild.testJavaLauncherVersion