diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java
index aee927b0da74fe4cb9fdf938b5f19e0cb9733a4e..2676ef74024676c4fb19b609c37a9e9644671ae9 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java
@@ -49,7 +49,7 @@ import com.oracle.truffle.r.test.TestBase;
 
 public final class FastRSession implements RSession {
 
-    private static final int TIMEOUT = System.getProperty("DisableTestTimeout") != null ? Integer.MAX_VALUE : 10000;
+    private static final int TIMEOUT = System.getProperty("DisableTestTimeout") != null ? Integer.MAX_VALUE : 20000;
 
     /**
      * A (virtual) console handler that collects the output in a {@link StringBuilder} for