diff --git a/org.eclipse.jgit.ant.test/.classpath b/org.eclipse.jgit.ant.test/.classpath
index eca7bdba8..3e5654f17 100644
--- a/org.eclipse.jgit.ant.test/.classpath
+++ b/org.eclipse.jgit.ant.test/.classpath
@@ -2,6 +2,10 @@
 <classpath>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/org.eclipse.jgit.http.test/.classpath b/org.eclipse.jgit.http.test/.classpath
index e6014c712..b25838024 100644
--- a/org.eclipse.jgit.http.test/.classpath
+++ b/org.eclipse.jgit.http.test/.classpath
@@ -2,7 +2,15 @@
 <classpath>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="tst"/>
-	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="tst">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/org.eclipse.jgit.junit.http/.classpath b/org.eclipse.jgit.junit.http/.classpath
index b862a296d..3e5654f17 100644
--- a/org.eclipse.jgit.junit.http/.classpath
+++ b/org.eclipse.jgit.junit.http/.classpath
@@ -1,7 +1,11 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
-	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="output" path="bin"/>
-</classpath>
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/org.eclipse.jgit.junit/.classpath b/org.eclipse.jgit.junit/.classpath
index eca7bdba8..3e5654f17 100644
--- a/org.eclipse.jgit.junit/.classpath
+++ b/org.eclipse.jgit.junit/.classpath
@@ -2,6 +2,10 @@
 <classpath>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/org.eclipse.jgit.lfs.server.test/.classpath b/org.eclipse.jgit.lfs.server.test/.classpath
index 4f9f6bf22..f08af0a4e 100644
--- a/org.eclipse.jgit.lfs.server.test/.classpath
+++ b/org.eclipse.jgit.lfs.server.test/.classpath
@@ -2,6 +2,10 @@
 <classpath>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="tst"/>
+	<classpathentry kind="src" path="tst">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/org.eclipse.jgit.lfs.test/.classpath b/org.eclipse.jgit.lfs.test/.classpath
index e43ae76c5..e79b7c763 100644
--- a/org.eclipse.jgit.lfs.test/.classpath
+++ b/org.eclipse.jgit.lfs.test/.classpath
@@ -2,7 +2,15 @@
 <classpath>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="src" path="tst"/>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="tst">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/org.eclipse.jgit.pgm.test/.classpath b/org.eclipse.jgit.pgm.test/.classpath
index b26f4c45d..1334739b7 100644
--- a/org.eclipse.jgit.pgm.test/.classpath
+++ b/org.eclipse.jgit.pgm.test/.classpath
@@ -1,7 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="src" path="tst"/>
-	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="tst">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="output" path="bin"/>
diff --git a/org.eclipse.jgit.test/.classpath b/org.eclipse.jgit.test/.classpath
index 84b5052a6..3b0dd26bc 100644
--- a/org.eclipse.jgit.test/.classpath
+++ b/org.eclipse.jgit.test/.classpath
@@ -1,9 +1,25 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry excluding="**/*.idx|**/*.pack" kind="src" path="tst"/>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="src" path="tst-rsrc"/>
-	<classpathentry kind="src" path="exttst"/>
+	<classpathentry excluding="**/*.idx|**/*.pack" kind="src" path="tst">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="tst-rsrc">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="exttst">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="output" path="bin"/>