diff --git a/.travis.yml b/.travis.yml
index 9f7c4a14..0c42284f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,12 @@
 language: java
+os: linux
+addons:
+  apt:
+    sources:
+      - llvm-toolchain-trusty-6.0
+      - ubuntu-toolchain-r-test
+    packages:
+      - clang-6.0
 
 env:
   - TARGET: website
diff --git a/lib/junit/BUCK b/lib/junit/BUCK
index 0d187f70..7cc0079c 100644
--- a/lib/junit/BUCK
+++ b/lib/junit/BUCK
@@ -7,7 +7,7 @@ load("//:yoga_defs.bzl", "YOGA_ROOTS", "yoga_java_library", "yoga_prebuilt_jar")
 
 yoga_prebuilt_jar(
     name = "junit-jar",
-    binary_jar = "junit4.jar",
+    binary_jar = "junit-4.12.jar",
 )
 
 yoga_java_library(
diff --git a/lib/junit/junit-4.12.jar b/lib/junit/junit-4.12.jar
new file mode 100644
index 00000000..3a7fc266
Binary files /dev/null and b/lib/junit/junit-4.12.jar differ
diff --git a/lib/junit/junit4.jar b/lib/junit/junit4.jar
deleted file mode 100644
index 954851e6..00000000
Binary files a/lib/junit/junit4.jar and /dev/null differ