diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ExtractVectorNodeTest.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ExtractVectorNodeTest.java
index 93fba813698c95daa2a755d58080d27bf38515c0..3d8898ebd7c9e82b3984ed5f2b8084ca3faed304 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ExtractVectorNodeTest.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ExtractVectorNodeTest.java
@@ -40,6 +40,10 @@ import com.oracle.truffle.r.runtime.data.model.*;
 
 @RunWith(Theories.class)
 public class ExtractVectorNodeTest extends TestBase {
+    @Test
+    public void dummy() {
+        // to make sure this file is recognized as a test
+    }
 
     @DataPoints public static RType[] vectorTypes = RType.getVectorTypes();
 
diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ReplaceVectorNodeTest.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ReplaceVectorNodeTest.java
index 411b401346abc91f8fa8381020b1b3024c6e158b..d7245041c0b1772a4b7fa3ab38cd7b8966e3566f 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ReplaceVectorNodeTest.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/ReplaceVectorNodeTest.java
@@ -40,6 +40,10 @@ import com.oracle.truffle.r.runtime.data.model.*;
 
 @RunWith(Theories.class)
 public class ReplaceVectorNodeTest extends TestBase {
+    @Test
+    public void dummy() {
+        // to make sure this file is recognized as a test
+    }
 
     @DataPoints public static RType[] vectorTypes = RType.getVectorTypes();
 
diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringCompareNodeTest.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringCompareNodeTest.java
index da49faeff096159af5e25b17ed438bb6b3ce7bf8..737a99bf9ddcea67eeecf57fa0571bd15afbd5d0 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringCompareNodeTest.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringCompareNodeTest.java
@@ -39,6 +39,10 @@ import com.oracle.truffle.r.runtime.*;
 
 @RunWith(Theories.class)
 public class StringCompareNodeTest extends TestBase {
+    @Test
+    public void dummy() {
+        // to make sure this file is recognized as a test
+    }
 
     // Please note that "FB" and "Ea" produce a hash collision. Thats why its tested here.
     @DataPoints public static String[] TEST = {RRuntime.STRING_NA, "a", "abc", "bc".intern(), "bc".intern(), "FB", "Ea"};
diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringSearchNodeTest.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringSearchNodeTest.java
index a3d95895c7e155d7c3e3312ea3de46fd7bb6f72a..b7fb90d88d183f3032feee11a018343b5a215545 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringSearchNodeTest.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/access/vector/StringSearchNodeTest.java
@@ -26,6 +26,7 @@ import static com.oracle.truffle.r.nodes.test.TestUtilities.*;
 import static org.hamcrest.CoreMatchers.*;
 import static org.hamcrest.MatcherAssert.*;
 
+import org.junit.Test;
 import org.junit.experimental.theories.*;
 import org.junit.runner.*;
 
@@ -37,6 +38,10 @@ import com.oracle.truffle.r.runtime.data.model.*;
 
 @RunWith(Theories.class)
 public class StringSearchNodeTest extends TestBase {
+    @Test
+    public void dummy() {
+        // to make sure this file is recognized as a test
+    }
 
     // Please note that "FB" and "Ea" produce a hash collision. Thats why its tested here.
     @DataPoints public static String[] TEST = {RRuntime.STRING_NA, "a", "abc", "bc".intern(), "bc".intern(), "FB", "Ea"};
diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryArithmeticNodeTest.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryArithmeticNodeTest.java
index 22b255d67d039fc181f527b6d98fb775567ffd71..bb690557e1b0f3050f4b633f9b3212a63aef7467 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryArithmeticNodeTest.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryArithmeticNodeTest.java
@@ -83,6 +83,10 @@ import com.oracle.truffle.r.runtime.ops.BinaryArithmeticFactory;
  */
 @RunWith(Theories.class)
 public class BinaryArithmeticNodeTest extends BinaryVectorTest {
+    @Test
+    public void dummy() {
+        // to make sure this file is recognized as a test
+    }
 
     @DataPoints public static final BinaryArithmeticFactory[] BINARY = BinaryArithmetic.ALL;
 
diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryBooleanNodeTest.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryBooleanNodeTest.java
index 1695b433349aa4aea487dc3ebc507e3f705eaf09..c706cf0580a4320d7310867bab5db156911a8bb3 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryBooleanNodeTest.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/BinaryBooleanNodeTest.java
@@ -43,6 +43,7 @@ import static org.junit.Assume.assumeThat;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
+import org.junit.Test;
 import org.junit.experimental.theories.DataPoint;
 import org.junit.experimental.theories.DataPoints;
 import org.junit.experimental.theories.Theories;
@@ -69,6 +70,10 @@ import com.oracle.truffle.r.runtime.ops.BooleanOperationFactory;
  */
 @RunWith(Theories.class)
 public class BinaryBooleanNodeTest extends BinaryVectorTest {
+    @Test
+    public void dummy() {
+        // to make sure this file is recognized as a test
+    }
 
     @DataPoint public static final RAbstractVector EMPTY_STRING = createEmptyStringVector();
     @DataPoint public static final RAbstractVector EMPTY_RAW = createEmptyRawVector();
diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/UnaryArithmeticNodeTest.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/UnaryArithmeticNodeTest.java
index f79b00999dbd46a258e958ec2b69d35a455dc77c..caf3f27d52dbc46a48bd6270f80e63733b86e498 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/UnaryArithmeticNodeTest.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/UnaryArithmeticNodeTest.java
@@ -70,6 +70,10 @@ import com.oracle.truffle.r.runtime.ops.UnaryArithmeticFactory;
  */
 @RunWith(Theories.class)
 public class UnaryArithmeticNodeTest extends BinaryVectorTest {
+    @Test
+    public void dummy() {
+        // to make sure this file is recognized as a test
+    }
 
     public static final UnaryArithmeticFactory[] ALL = new UnaryArithmeticFactory[]{NEGATE, Round.ROUND, Floor.FLOOR, Ceiling.CEILING, PLUS};