diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java b/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java
index 27266e642..b6bd21bb7 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/Expression.java
@@ -127,34 +127,34 @@ public class Expression {
             ((Variable) invokable).value = values[i];
         }
 
-        pushInstance();
-        try {
-            Future<Double> result = evalThread.submit(new Callable<Double>() {
-                @Override
-                public Double call() throws Exception {
+        Future<Double> result = evalThread.submit(new Callable<Double>() {
+            @Override
+            public Double call() throws Exception {
+                pushInstance();
+                try {
                     return root.getValue();
+                } finally {
+                    popInstance();
                 }
-            });
-            try {
-                return result.get(WorldEdit.getInstance().getConfiguration().calculationTimeout, TimeUnit.MILLISECONDS);
-            } catch (InterruptedException e) {
-                Thread.currentThread().interrupt();
-                throw new RuntimeException(e);
-            } catch (ExecutionException e) {
-                Throwable cause = e.getCause();
-                if (cause instanceof ReturnException) {
-                    return ((ReturnException) cause).getValue();
-                }
-                if (cause instanceof RuntimeException) {
-                    throw (RuntimeException) cause;
-                }
-                throw new RuntimeException(cause);
-            } catch (TimeoutException e) {
-                result.cancel(true);
-                throw new EvaluationException(-1, "Calculations exceeded time limit.");
             }
-        } finally {
-            popInstance();
+        });
+        try {
+            return result.get(WorldEdit.getInstance().getConfiguration().calculationTimeout, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new RuntimeException(e);
+        } catch (ExecutionException e) {
+            Throwable cause = e.getCause();
+            if (cause instanceof ReturnException) {
+                return ((ReturnException) cause).getValue();
+            }
+            if (cause instanceof RuntimeException) {
+                throw (RuntimeException) cause;
+            }
+            throw new RuntimeException(cause);
+        } catch (TimeoutException e) {
+            result.cancel(true);
+            throw new EvaluationException(-1, "Calculations exceeded time limit.");
         }
     }
 
diff --git a/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java b/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java
index 1d0456d01..207bb4e56 100644
--- a/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java
+++ b/worldedit-core/src/test/java/com/sk89q/worldedit/internal/expression/ExpressionTest.java
@@ -24,13 +24,23 @@ import static java.lang.Math.sin;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
+import org.junit.Before;
+import org.junit.Test;
+
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.event.platform.PlatformReadyEvent;
 import com.sk89q.worldedit.internal.expression.lexer.LexerException;
 import com.sk89q.worldedit.internal.expression.parser.ParserException;
 import com.sk89q.worldedit.internal.expression.runtime.EvaluationException;
 import com.sk89q.worldedit.internal.expression.runtime.ExpressionEnvironment;
-import org.junit.Test;
 
 public class ExpressionTest {
+    @Before
+    public void setup() {
+        WorldEdit.getInstance().getPlatformManager().register(new ExpressionPlatform());
+        WorldEdit.getInstance().getPlatformManager().handlePlatformReady(new PlatformReadyEvent());
+    }
+
     @Test
     public void testEvaluate() throws ExpressionException {
         // check