diff --git a/.codecov.yml b/.codecov.yml
new file mode 100644
index 0000000..72042e7
--- /dev/null
+++ b/.codecov.yml
@@ -0,0 +1,14 @@
+# Documentation: https://github.com/codecov/support/wiki/codecov.yml
+
+coverage:
+  precision: 3
+  round: down
+  range: 80...100
+
+  status:
+    # Learn more at https://codecov.io/docs#yaml_default_commit_status
+    project: true
+    patch: true
+    changes: false
+
+comment: false
diff --git a/.gitignore b/.gitignore
index 4fdb039..79feee2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 libvibe_core.a
 vibe-core-test-*
 *.exe
+*.lst
 *.obj
 *.sln
 dub.selections.json
diff --git a/.travis.yml b/.travis.yml
index a49e42a..42ca64e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,7 +24,17 @@ matrix:
   allow_failures:
     - env: CONFIG=libasync
     - d: dmd-beta
+  include:
+    - d: dmd
+      env: CONFIG='select' DUB_FLAGS='--build unittest-cov --build-mode=singleFile'
+    - d: dmd
+      env: CONFIG='select' DUB_FLAGS='--build unittest-cov --build-mode=singleFile'
+    - d: dmd
+      env: CONFIG='select' DUB_FLAGS='--build unittest-cov --build-mode=singleFile'
 
 script: ./travis-ci.sh
 
 sudo: false
+
+after_success:
+ - bash <(curl -s https://codecov.io/bash)
diff --git a/travis-ci.sh b/travis-ci.sh
index 2c8df94..0ee913f 100755
--- a/travis-ci.sh
+++ b/travis-ci.sh
@@ -2,15 +2,17 @@
 
 set -e -x -o pipefail
 
+DUB_FLAGS=${DUB_FLAGS:-}
+
 # test for successful release build
-dub build -b release --compiler=$DC -c $CONFIG
+dub build -b release --compiler=$DC -c $CONFIG $DUB_FLAGS
 
 # test for successful 32-bit build
 if [ "$DC" == "dmd" ]; then
-	dub build --arch=x86 -c $CONFIG
+	dub build --arch=x86 -c $CONFIG $DUB_FLAGS
 fi
 
-dub test --compiler=$DC -c $CONFIG
+dub test --compiler=$DC -c $CONFIG $DUB_FLAGS
 
 if [ ${BUILD_EXAMPLE=1} -eq 1 ]; then
     for ex in $(\ls -1 examples/); do