diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 2a023bfe2e..9e83f401e0 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -21,16 +21,16 @@ jobs:
             epVersion: 2.4.0
           - os: macos-latest
             java: 11
-            epVersion: 2.19.1
+            epVersion: 2.20.0
           - os: ubuntu-latest
             java: 11
-            epVersion: 2.19.1
+            epVersion: 2.20.0
           - os: windows-latest
             java: 11
-            epVersion: 2.19.1
+            epVersion: 2.20.0
           - os: ubuntu-latest
             java: 17
-            epVersion: 2.19.1
+            epVersion: 2.20.0
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
@@ -76,7 +76,7 @@ jobs:
         with:
           arguments: coveralls
         continue-on-error: true
-        if: runner.os == 'Linux' && matrix.java == '11' && matrix.epVersion == '2.19.1' && github.repository == 'uber/NullAway'
+        if: runner.os == 'Linux' && matrix.java == '11' && matrix.epVersion == '2.20.0' && github.repository == 'uber/NullAway'
       - name: Test publishToMavenLocal flow
         env:
           ORG_GRADLE_PROJECT_epApiVersion: ${{ matrix.epVersion }}
diff --git a/gradle/dependencies.gradle b/gradle/dependencies.gradle
index 8c8d72a613..961df9b844 100755
--- a/gradle/dependencies.gradle
+++ b/gradle/dependencies.gradle
@@ -19,7 +19,7 @@ import org.gradle.util.VersionNumber
 // The oldest version of Error Prone that we support running on
 def oldestErrorProneVersion = "2.4.0"
 // Latest released Error Prone version that we've tested with
-def latestErrorProneVersion = "2.19.1"
+def latestErrorProneVersion = "2.20.0"
 // Default to using latest tested Error Prone version, except on Java 8, where 2.10.0 is the last version
 // that works
 def defaultErrorProneVersion =  JavaVersion.current() >= JavaVersion.VERSION_11 ? latestErrorProneVersion : "2.10.0"
diff --git a/jar-infer/jar-infer-lib/src/test/java/com/uber/nullaway/jarinfer/JarInferTest.java b/jar-infer/jar-infer-lib/src/test/java/com/uber/nullaway/jarinfer/JarInferTest.java
index dda6aaf47b..897e96e2ed 100644
--- a/jar-infer/jar-infer-lib/src/test/java/com/uber/nullaway/jarinfer/JarInferTest.java
+++ b/jar-infer/jar-infer-lib/src/test/java/com/uber/nullaway/jarinfer/JarInferTest.java
@@ -170,7 +170,7 @@ private void testAnnotationInAarTemplate(
    * @param result Map of 'method signatures' to their 'inferred list of NonNull parameters'.
    * @param expected Map of 'method signatures' to their 'expected list of NonNull parameters'.
    */
-  private boolean verify(Map<String, Set<Integer>> result, HashMap<String, Set<Integer>> expected) {
+  private boolean verify(Map<String, Set<Integer>> result, Map<String, Set<Integer>> expected) {
     for (Map.Entry<String, Set<Integer>> entry : result.entrySet()) {
       String mtd_sign = entry.getKey();
       Set<Integer> ddParams = entry.getValue();