diff --git a/gerrit-acceptance-framework/src/test/java/com/google/gerrit/acceptance/AbstractDaemonTest.java b/gerrit-acceptance-framework/src/test/java/com/google/gerrit/acceptance/AbstractDaemonTest.java
index 3aef476aa4..6733380297 100644
--- a/gerrit-acceptance-framework/src/test/java/com/google/gerrit/acceptance/AbstractDaemonTest.java
+++ b/gerrit-acceptance-framework/src/test/java/com/google/gerrit/acceptance/AbstractDaemonTest.java
@@ -342,6 +342,20 @@ public abstract class AbstractDaemonTest {
     server.getTestInjector().injectMembers(this);
     Transport.register(inProcessProtocol);
     toClose = Collections.synchronizedList(new ArrayList<Repository>());
+
+    // All groups which were added during the server start (e.g. in SchemaCreator) aren't contained
+    // in the instance of the group index which is available here and in tests. There are two
+    // reasons:
+    // 1) No group index is available in SchemaCreator when using an in-memory database. (This could
+    // be fixed by using the IndexManagerOnInit in InMemoryDatabase similar as BaseInit uses it.)
+    // 2) During the on-init part of the server start, we use another instance of the index than
+    // later on. As test indexes are non-permanent, closing an instance and opening another one
+    // removes all indexed data.
+    // As a workaround, we simply reindex all available groups here.
+    for (AccountGroup group : groupCache.all()) {
+      groupCache.evict(group);
+    }
+
     admin = accountCreator.admin();
     user = accountCreator.user();
 
diff --git a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/group/GroupsIT.java b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/group/GroupsIT.java
index 2cef672d97..26383e5d11 100644
--- a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/group/GroupsIT.java
+++ b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/api/group/GroupsIT.java
@@ -63,6 +63,12 @@ import org.junit.Test;
 public class GroupsIT extends AbstractDaemonTest {
   @Inject @ServerInitiated private Provider<GroupsUpdate> groupsUpdateProvider;
 
+  @Test
+  public void systemGroupCanBeRetrievedFromIndex() throws Exception {
+    List<GroupInfo> groupInfos = gApi.groups().query("name:Administrators").get();
+    assertThat(groupInfos).isNotEmpty();
+  }
+
   @Test
   public void addToNonExistingGroup_NotFound() throws Exception {
     exception.expect(ResourceNotFoundException.class);
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/query/group/GroupPredicates.java b/gerrit-server/src/main/java/com/google/gerrit/server/query/group/GroupPredicates.java
index 6d3d9bad30..c6cf3bea29 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/query/group/GroupPredicates.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/query/group/GroupPredicates.java
@@ -37,8 +37,7 @@ public class GroupPredicates {
   }
 
   public static Predicate<AccountGroup> name(String name) {
-    return new GroupPredicate(
-        GroupField.NAME, GroupQueryBuilder.FIELD_NAME, name.toLowerCase(Locale.US));
+    return new GroupPredicate(GroupField.NAME, GroupQueryBuilder.FIELD_NAME, name);
   }
 
   public static Predicate<AccountGroup> owner(AccountGroup.UUID ownerUuid) {
diff --git a/gerrit-server/src/test/java/com/google/gerrit/server/query/group/AbstractQueryGroupsTest.java b/gerrit-server/src/test/java/com/google/gerrit/server/query/group/AbstractQueryGroupsTest.java
index db89eda769..09b2af94af 100644
--- a/gerrit-server/src/test/java/com/google/gerrit/server/query/group/AbstractQueryGroupsTest.java
+++ b/gerrit-server/src/test/java/com/google/gerrit/server/query/group/AbstractQueryGroupsTest.java
@@ -185,9 +185,9 @@ public abstract class AbstractQueryGroupsTest extends GerritServerTests {
   public void byName() throws Exception {
     assertQuery("name:non-existing");
 
-    GroupInfo group = createGroup(name("group"));
+    GroupInfo group = createGroup(name("Group"));
     assertQuery("name:" + group.name, group);
-    assertQuery("name:" + group.name.toUpperCase(Locale.US), group);
+    assertQuery("name:" + group.name.toLowerCase(Locale.US));
 
     // only exact match
     GroupInfo groupWithHyphen = createGroup(name("group-with-hyphen"));