diff --git a/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneChangeIndex.java b/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneChangeIndex.java
index 4bc5b5c1ea..2b5335bfa5 100644
--- a/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneChangeIndex.java
+++ b/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneChangeIndex.java
@@ -181,7 +181,7 @@ public class LuceneChangeIndex implements ChangeIndex {
     queryBuilder = new QueryBuilder(openConfig.getAnalyzer());
 
     SearcherFactory searcherFactory = new SearcherFactory();
-    if (cfg.getBoolean("index", "lucene", "testInmemory", false)) {
+    if (LuceneIndexModule.isInMemoryTest(cfg)) {
       openIndex = new SubIndex(new RAMDirectory(), "ramOpen", openConfig,
           searcherFactory);
       closedIndex = new SubIndex(new RAMDirectory(), "ramClosed", closedConfig,
diff --git a/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneIndexModule.java b/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneIndexModule.java
index b89dd8a86d..33eebe4fba 100644
--- a/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneIndexModule.java
+++ b/gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneIndexModule.java
@@ -31,6 +31,10 @@ import org.apache.lucene.search.BooleanQuery;
 import org.eclipse.jgit.lib.Config;
 
 public class LuceneIndexModule extends LifecycleModule {
+  static boolean isInMemoryTest(Config cfg) {
+    return cfg.getBoolean("index", "lucene", "testInmemory", false);
+  }
+
   private final Integer singleVersion;
   private final int threads;