diff --git a/apct-tests/perftests/core/Android.bp b/apct-tests/perftests/core/Android.bp
index 9366ff2d81a9..e1b3241e051e 100644
--- a/apct-tests/perftests/core/Android.bp
+++ b/apct-tests/perftests/core/Android.bp
@@ -66,6 +66,7 @@ android_test {
     errorprone: {
         javacflags: [
             "-Xep:ReturnValueIgnored:WARN",
+            "-Xep:UnnecessaryStringBuilder:OFF",
         ],
     },
 }
diff --git a/errorprone/java/com/google/errorprone/bugpatterns/android/HideInCommentsChecker.java b/errorprone/java/com/google/errorprone/bugpatterns/android/HideInCommentsChecker.java
index 07f1d4a09006..8dc9579e6b52 100644
--- a/errorprone/java/com/google/errorprone/bugpatterns/android/HideInCommentsChecker.java
+++ b/errorprone/java/com/google/errorprone/bugpatterns/android/HideInCommentsChecker.java
@@ -63,7 +63,7 @@ public class HideInCommentsChecker extends BugChecker implements
 
     @Override
     public Description matchCompilationUnit(CompilationUnitTree tree, VisitorState state) {
-        final Map<Integer, Tree> javadocableTrees = findJavadocableTrees(tree);
+        final Map<Integer, Tree> javadocableTrees = findJavadocableTrees(tree, state);
         final String sourceCode = state.getSourceCode().toString();
         for (ErrorProneToken token : ErrorProneTokens.getTokens(sourceCode, state.context)) {
             for (Tokens.Comment comment : token.comments()) {
@@ -112,9 +112,9 @@ public class HideInCommentsChecker extends BugChecker implements
     }
 
 
-    private Map<Integer, Tree> findJavadocableTrees(CompilationUnitTree tree) {
+    private Map<Integer, Tree> findJavadocableTrees(CompilationUnitTree tree, VisitorState state) {
         Map<Integer, Tree> javadoccableTrees = new HashMap<>();
-        new SuppressibleTreePathScanner<Void, Void>() {
+        new SuppressibleTreePathScanner<Void, Void>(state) {
             @Override
             public Void visitClass(ClassTree classTree, Void unused) {
                 javadoccableTrees.put(getStartPosition(classTree), classTree);
diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index d78038ecee61..9ab9ba8bbfed 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -224,6 +224,11 @@ android_library {
         extra_check_modules: ["SystemUILintChecker"],
         warning_checks: ["MissingApacheLicenseDetector"],
     },
+    errorprone: {
+        javacflags: [
+            "-Xep:InvalidPatternSyntax:WARN",
+        ],
+    },
 }
 
 filegroup {
@@ -548,6 +553,11 @@ android_library {
         test: true,
         extra_check_modules: ["SystemUILintChecker"],
     },
+    errorprone: {
+        javacflags: [
+            "-Xep:InvalidPatternSyntax:WARN",
+        ],
+    },
 }
 
 android_app {
@@ -589,6 +599,12 @@ android_app {
     },
 
     plugins: ["dagger2-compiler"],
+
+    errorprone: {
+        javacflags: [
+            "-Xep:InvalidPatternSyntax:WARN",
+        ],
+    },
 }
 
 android_robolectric_test {
diff --git a/tests/SmokeTestApps/Android.bp b/tests/SmokeTestApps/Android.bp
index 3505fe1c4afb..38ee8ac99747 100644
--- a/tests/SmokeTestApps/Android.bp
+++ b/tests/SmokeTestApps/Android.bp
@@ -11,4 +11,7 @@ android_test {
     name: "SmokeTestTriggerApps",
     srcs: ["src/**/*.java"],
     sdk_version: "current",
+    errorprone: {
+        enabled: false,
+    },
 }