diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4af0f4c..11ba256 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,7 +18,7 @@ jobs:
         with:
           java-version: ${{ matrix.java }}
       - name: Build with Maven
-        run: mvn -B package --file pom.xml -Drun.jvmArguments="-Xmx4048m -Xms1024"
+        run: mvn -B package --file pom.xml -Drun.jvmArguments="-Xmx4048m -Xms1024m"
       - uses: actions/upload-artifact@v2
         with:
           name: delight-nashorn-sandbox
diff --git a/src/test/java/delight/nashornsandbox/TestSystemRequirements.java b/src/test/java/delight/nashornsandbox/TestSystemRequirements.java
index 339aa98..429727f 100644
--- a/src/test/java/delight/nashornsandbox/TestSystemRequirements.java
+++ b/src/test/java/delight/nashornsandbox/TestSystemRequirements.java
@@ -9,7 +9,8 @@ public class TestSystemRequirements {
   @Test
   public void test_cpu() {  
     int processors = Runtime.getRuntime().availableProcessors();
-    assertTrue("Unit tests likely to fail since they are run on a low-spec machine. Try to run on a machine with at least 2 CPU cores", processors > 1);
+    assertTrue("Unit tests likely to fail since they are run on a low-spec machine. Try to run on a machine with at least 2 CPU cores.\n"+
+    "Processors detected: "+processors, processors > 1);
   }
 
   @Test
@@ -17,7 +18,9 @@ public void test_memory() {
     long maxMemory = Runtime.getRuntime().maxMemory();
     assertTrue("Unit test likely to fail. Run in an environment where the JVM has access to at least 2 GB max memory.\n"+
       "Max heap memory detected "+
-      maxMemory, maxMemory > 1_320_327_936);
+      maxMemory + "\n"+
+      "Also ensure correct JVM parameters set when running tests, e.g. -Drun.jvmArguments=\"-Xmx4048m -Xms1024m\"",
+      maxMemory > 1_320_327_936);
   }
   
 }