diff --git a/.travis.yml b/.travis.yml
index 74ab082..10fe5ce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,9 @@ jdk:
   - oraclejdk8
 
 scala:
-  - 2.11.8
+  - 2.11.12
 
-script: sbt ++$TRAVIS_SCALA_VERSION clean test
+script: sbt ++$TRAVIS_SCALA_VERSION clean coverageTest
 
 cache:
   directories:
@@ -14,7 +14,7 @@ cache:
   - $HOME/.sbt/boot/
   - $HOME/.zinc
 
-after_success: sbt ++$TRAVIS_SCALA_VERSION travis-report
+after_success: sbt ++$TRAVIS_SCALA_VERSION travisReport
 
 before_cache:
   # Tricks to avoid unnecessary cache updates
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 9dc0442..0003a9d 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("org.hammerlab.sbt" % "base" % "4.1.0")
+addSbtPlugin("org.hammerlab.sbt" % "base" % "4.2.0")
diff --git a/src/main/scala/org/hammerlab/genomics/reference/ContigName.scala b/src/main/scala/org/hammerlab/genomics/reference/ContigName.scala
index 115e795..ac00d84 100644
--- a/src/main/scala/org/hammerlab/genomics/reference/ContigName.scala
+++ b/src/main/scala/org/hammerlab/genomics/reference/ContigName.scala
@@ -103,7 +103,7 @@ object ContigName {
   implicit object Strict extends Factory {
 
     // Exposed for testing
-    private[reference] def clear(): Unit = {
+    def clear(): Unit = {
       seenChrsOpt = None
       names.clear()
     }