diff --git a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestInput.java b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestInput.java
index 84882105be..61fa54e65f 100644
--- a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestInput.java
+++ b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestInput.java
@@ -20,8 +20,8 @@ public ImmutableSet<Object> elidedTypesAndStaticImports() {
         Arrays.class, Collections.class, Comparator.class, Streams.class, naturalOrder());
   }
 
-  ImmutableList.Builder<String> testImmutableListBuilder() {
-    return new ImmutableList.Builder<>();
+  ImmutableSet<ImmutableList.Builder<String>> testImmutableListBuilder() {
+    return ImmutableSet.of(new ImmutableList.Builder<>(), new ImmutableList.Builder<String>());
   }
 
   ImmutableSet<ImmutableList<Integer>> testIterableToImmutableList() {
diff --git a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestOutput.java b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestOutput.java
index b152693d25..ac04fd42cf 100644
--- a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestOutput.java
+++ b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableListRulesTestOutput.java
@@ -21,8 +21,8 @@ public ImmutableSet<Object> elidedTypesAndStaticImports() {
         Arrays.class, Collections.class, Comparator.class, Streams.class, naturalOrder());
   }
 
-  ImmutableList.Builder<String> testImmutableListBuilder() {
-    return ImmutableList.builder();
+  ImmutableSet<ImmutableList.Builder<String>> testImmutableListBuilder() {
+    return ImmutableSet.of(ImmutableList.builder(), ImmutableList<String>builder());
   }
 
   ImmutableSet<ImmutableList<Integer>> testIterableToImmutableList() {
diff --git a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestInput.java b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestInput.java
index 53e7c41556..18f26ea85f 100644
--- a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestInput.java
+++ b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestInput.java
@@ -21,8 +21,8 @@ public ImmutableSet<Object> elidedTypesAndStaticImports() {
     return ImmutableSet.of(Arrays.class, Collections.class, Streams.class, not(null));
   }
 
-  ImmutableSet.Builder<String> testImmutableSetBuilder() {
-    return new ImmutableSet.Builder<>();
+  ImmutableSet<ImmutableSet.Builder<String>> testImmutableSetBuilder() {
+    return ImmutableSet.of(new ImmutableSet.Builder<>(), new ImmutableSet.Builder<Integer>());
   }
 
   ImmutableSet<ImmutableSet<Integer>> testIterableToImmutableSet() {
diff --git a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestOutput.java b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestOutput.java
index 74a6c9d67e..2c4330db05 100644
--- a/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestOutput.java
+++ b/error-prone-contrib/src/test/resources/tech/picnic/errorprone/refasterrules/ImmutableSetRulesTestOutput.java
@@ -21,8 +21,8 @@ public ImmutableSet<Object> elidedTypesAndStaticImports() {
     return ImmutableSet.of(Arrays.class, Collections.class, Streams.class, not(null));
   }
 
-  ImmutableSet.Builder<String> testImmutableSetBuilder() {
-    return ImmutableSet.builder();
+  ImmutableSet<ImmutableSet.Builder<String>> testImmutableSetBuilder() {
+    return ImmutableSet.of(ImmutableSet.builder(), ImmutableSet.<Integer>builder());
   }
 
   ImmutableSet<ImmutableSet<Integer>> testIterableToImmutableSet() {