Figured it out.

.travis.yml

@@ -3,18 +3,15 @@ matrix:
   include:
     - os: windows
       language: bash
-      env:
-        - MVNW_VERBOSE=true
       before_script:
         - choco install adoptopenjdk11
-        - find "/c/Program Files/AdoptOpenJDK" -name 'javac.exe'
-        - 'export JAVA_HOME="$(dirname "$(dirname "$(find "/c/Program Files/AdoptOpenJDK" -name javac.exe)")")" && echo $JAVA_HOME'
-        - echo "$JAVA_HOME"
-      #script: ./mvnw -B -e verify site site:stage
+        - export JAVA_HOME="$(dirname "$(dirname "$(find "/c/Program Files" -name javac.exe)")")"
     - os: linux
       dist: trusty
       language: java
       jdk: openjdk8
+      after_success:
+        - ./mvnw -B -Pcoverage clean verify coveralls:report
     - os: linux
       dist: trusty
       language: java
@@ -29,8 +26,6 @@ matrix:
       jdk: oraclejdk11
 script:
   - ./mvnw -B -e verify site site:stage
-after_success:
-  - ./mvnw -B -Pcoverage clean verify coveralls:report
 cache:
   directories:
     - $HOME/.m2