diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..e0e5c24
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,52 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        java-version:
+          - 1.8
+          - 9
+          - 10
+          - 11
+          - 12
+          - 13
+          - 14
+          - 15-ea
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Validate Gradle Wrapper
+        uses: gradle/wrapper-validation-action@v1
+
+      - name: Generate cache key
+        run: ./.github/workflows/checksum.sh checksum.txt
+
+      - uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ matrix.java-version }}-${{ hashFiles('checksum.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-${{ matrix.java-version }}-
+
+      - name: Configure JDK
+        uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java-version }}
+
+      - name: Test
+        run: ./gradlew build check
+
+      - name: Publish (default branch only)
+        if: github.ref == 'refs/heads/master' && matrix.java-version == '1.7'
+        run: ./gradlew uploadArchives
+        env:
+          ORG_GRADLE_PROJECT_SONATYPE_NEXUS_USERNAME: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+          ORG_GRADLE_PROJECT_SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
diff --git a/.github/workflows/checksum.sh b/.github/workflows/checksum.sh
new file mode 100755
index 0000000..5e15f61
--- /dev/null
+++ b/.github/workflows/checksum.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+RESULT_FILE=$1
+
+if [[ -f ${RESULT_FILE} ]]; then
+  rm ${RESULT_FILE}
+fi
+touch ${RESULT_FILE}
+
+checksum_file() {
+  echo $(openssl md5 $1 | awk '{print $2}')
+}
+
+FILES=()
+while read -r -d ''; do
+	FILES+=("$REPLY")
+done < <(find . -type f \( -name "build.gradle*" -o -name "settings.gradle*" -o -name "gradle-wrapper.properties" \) -print0)
+
+# Loop through files and append MD5 to result file
+for FILE in ${FILES[@]}; do
+	echo $(checksum_file ${FILE}) >> ${RESULT_FILE}
+done
+# Now sort the file so that it is idempotent.
+sort ${RESULT_FILE} -o ${RESULT_FILE}
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 167dbb9..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-language: java
-
-jdk:
-  - openjdk8
-
-script:
-  - ./gradlew build check
-
-after_success:
-  - .buildscript/deploy_snapshot.sh
-
-env:
-  global:
-    - secure: "TM2N/yo3azbA7+J6WG0W1RmK4vvS7b4JzvJP8NcXpoZCQw2Je1nQqmKS3F/04/DEUf8+SKVh2thKEeUxLN8knCO0OQLxeKIFj9PLvtgHnV8beB+pPxUdpEvMlB6ISeDsOZ098zoax28zfMwR7+uMeGe2VbtTSpwtqt4jkWx3ooA="
-    - secure: "A5flBI/PCmmxuHjqG73CIXqHYg8X1GWloA3jv0zrhCAuK5m3nAvt7JY2qom22ttEY9JI32dlArxhusrKib18gKNgZbxzoN5PydkG6T0uuGZw+uZM6jPiTlvkC0F4ikL6lg1dBap4BoakDMwAPfb11UpETamBGKOWdopLqw6T6w0="
-
-branches:
-  except:
-    - gh-pages
-
-notifications:
-  email: false
-
-before_cache:
-  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
-  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
-
-cache:
-  directories:
-    - $HOME/.gradle/caches/
-    - $HOME/.gradle/wrapper/
\ No newline at end of file
diff --git a/kotlin/tests/src/test/kotlin/com/squareup/moshi/kotlin/reflect/KotlinJsonAdapterTest.kt b/kotlin/tests/src/test/kotlin/com/squareup/moshi/kotlin/reflect/KotlinJsonAdapterTest.kt
index 0bec5d0..40e1e63 100644
--- a/kotlin/tests/src/test/kotlin/com/squareup/moshi/kotlin/reflect/KotlinJsonAdapterTest.kt
+++ b/kotlin/tests/src/test/kotlin/com/squareup/moshi/kotlin/reflect/KotlinJsonAdapterTest.kt
@@ -688,7 +688,7 @@ class KotlinJsonAdapterTest {
     var a = 5
   }
 
-  @Test fun objectExpressionsNotSupported() {
+  @Test fun anonymousClassesNotSupported() {
     val expression = object : Any() {
       var a = 5
     }
@@ -697,9 +697,16 @@ class KotlinJsonAdapterTest {
       moshi.adapter(expression.javaClass)
       fail()
     } catch (e: IllegalArgumentException) {
+      // anonymous/local classes are slightly different in bytecode across JVM versions
+      val javaVersion = System.getProperty("java.version")
+      val type = if (javaVersion.startsWith("1.8")) {
+        "local class or object expression"
+      } else {
+        "anonymous class"
+      }
       assertThat(e).hasMessage(
-        "Cannot serialize local class or object expression " +
-          "com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterTest\$objectExpressionsNotSupported" +
+        "Cannot serialize $type " +
+          "com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterTest\$anonymousClassesNotSupported" +
           "\$expression$1"
       )
     }
diff --git a/moshi/src/test/java/com/squareup/moshi/CircularAdaptersTest.java b/moshi/src/test/java/com/squareup/moshi/CircularAdaptersTest.java
index 7e21a38..bd6dabc 100644
--- a/moshi/src/test/java/com/squareup/moshi/CircularAdaptersTest.java
+++ b/moshi/src/test/java/com/squareup/moshi/CircularAdaptersTest.java
@@ -53,7 +53,9 @@ public final class CircularAdaptersTest {
     JsonAdapter<Team> teamAdapter = moshi.adapter(Team.class);
 
     Team team =
-        new Team("Alice", new Project("King", new Team("Charlie", new Project("Delivery", null))));
+        new Team(
+            "Alice",
+            new Project("King", new Team("Charlie", new Project("Delivery", (Team[]) null))));
     assertThat(teamAdapter.toJson(team))
         .isEqualTo(
             "{\"lead\":\"Alice\",\"projects\":[{\"name\":"