diff --git a/.travis.yml b/.travis.yml
index 8617453..2c55895 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,15 @@ d:
   - ldc-1.1.0-beta6
   - dmd-2.071.2
 
+env:
+    - CONFIG=select
+    - CONFIG=epoll
+    - CONFIG=libasync
+
+matrix:
+  allow_failures:
+    - env: CONFIG=libasync
+
 script: ./travis-ci.sh
 
 sudo: false
diff --git a/dub.sdl b/dub.sdl
index d0d5baa..5224374 100644
--- a/dub.sdl
+++ b/dub.sdl
@@ -6,10 +6,24 @@ license "MIT"
 
 dependency "eventcore" version="~>0.5.0"
 
-//subConfiguration "eventcore" "libasync"
-
 mainSourceFile "source/vibe/appmain.d"
 
-configuration "unittest" {
+configuration "winapi" {
+	subConfiguration "eventcore" "winapi"
+}
+configuration "epoll" {
+	subConfiguration "eventcore" "epoll"
+}
+configuration "kqueue" {
+	subConfiguration "eventcore" "kqueue"
+}
+configuration "select" {
+	subConfiguration "eventcore" "select"
+}
+configuration "libasync" {
+	subConfiguration "eventcore" "libasync"
+}
+
+buildType "unittest" {
 	debugVersions "VibeMutexLog" "VibeAsyncLog"
 }
diff --git a/travis-ci.sh b/travis-ci.sh
index 586d131..d816449 100755
--- a/travis-ci.sh
+++ b/travis-ci.sh
@@ -3,24 +3,25 @@
 set -e -x -o pipefail
 
 # test for successful release build
-dub build --combined -b release --compiler=$DC
+dub build -b release --compiler=$DC -c $CONFIG
 
 # test for successful 32-bit build
 if [ "$DC" == "dmd" ]; then
-	dub build --combined --arch=x86
+	dub build --arch=x86 -c $CONFIG
 fi
 
-dub test --combined --compiler=$DC
+dub test --compiler=$DC -c $CONFIG
 
 if [ ${BUILD_EXAMPLE=1} -eq 1 ]; then
     for ex in $(\ls -1 examples/); do
         echo "[INFO] Building example $ex"
+        # --override-config vibe-core/$CONFIG
         (cd examples/$ex && dub build --compiler=$DC && dub clean)
     done
 fi
 if [ ${RUN_TEST=1} -eq 1 ]; then
     for ex in `\ls -1 tests/*.d`; do
         echo "[INFO] Running test $ex"
-        dub --temp-build --compiler=$DC --single $ex
+        dub --temp-build --compiler=$DC --single $ex # --override-config vibe-core/$CONFIG
     done
 fi