diff --git a/quesma/elasticsearch/index_resolver.go b/quesma/elasticsearch/index_resolver.go
index 35e9ac166..9d8e141cc 100644
--- a/quesma/elasticsearch/index_resolver.go
+++ b/quesma/elasticsearch/index_resolver.go
@@ -42,6 +42,13 @@ func NewIndexResolver(elasticsearchUrl string) IndexResolver {
 	}
 }
 
+func NormalizePattern(p string) string {
+	if p == "_all" {
+		return "*"
+	}
+	return p
+}
+
 func (im *indexResolver) Resolve(indexPattern string) (Sources, bool, error) {
 	req, _ := http.NewRequest("GET", im.Url+"/_resolve/index/"+indexPattern+"?expand_wildcards=open", bytes.NewBuffer([]byte{}))
 	response, err := im.httpClient.Do(req)
diff --git a/quesma/quesma/matchers.go b/quesma/quesma/matchers.go
index f2f63b8dc..b6e757088 100644
--- a/quesma/quesma/matchers.go
+++ b/quesma/quesma/matchers.go
@@ -34,7 +34,7 @@ func matchedAgainstBulkBody(configuration config.QuesmaConfiguration) func(m map
 
 func matchedAgainstPattern(configuration config.QuesmaConfiguration) mux.MatchPredicate {
 	return func(m map[string]string, _ string) bool {
-		indexPattern := m["index"]
+		indexPattern := elasticsearch.NormalizePattern(m["index"])
 		if elasticsearch.IsInternalIndex(indexPattern) {
 			logger.Debug().Msgf("index %s is an internal Elasticsearch index, skipping", indexPattern)
 			return false
@@ -52,7 +52,7 @@ func matchedAgainstPattern(configuration config.QuesmaConfiguration) mux.MatchPr
 
 			for _, pattern := range indexPatterns {
 				for _, indexName := range configuration.IndexConfig {
-					if config.MatchName(preprocessPattern(pattern), indexName.Name) {
+					if config.MatchName(elasticsearch.NormalizePattern(pattern), indexName.Name) {
 						if configuration.IndexConfig[indexName.Name].Enabled {
 							return true
 						}
@@ -62,7 +62,7 @@ func matchedAgainstPattern(configuration config.QuesmaConfiguration) mux.MatchPr
 			return false
 		} else {
 			for _, index := range configuration.IndexConfig {
-				pattern := preprocessPattern(indexPattern)
+				pattern := elasticsearch.NormalizePattern(indexPattern)
 				if config.MatchName(pattern, index.Name) {
 					if indexConfig, exists := configuration.IndexConfig[index.Name]; exists {
 						return indexConfig.Enabled
@@ -74,10 +74,3 @@ func matchedAgainstPattern(configuration config.QuesmaConfiguration) mux.MatchPr
 		}
 	}
 }
-
-func preprocessPattern(p string) string {
-	if p == "_all" {
-		return "*"
-	}
-	return p
-}
diff --git a/quesma/quesma/router.go b/quesma/quesma/router.go
index af319ba2a..b0b0aa910 100644
--- a/quesma/quesma/router.go
+++ b/quesma/quesma/router.go
@@ -58,7 +58,7 @@ func configureRouter(cfg config.QuesmaConfiguration, lm *clickhouse.LogManager,
 	})
 
 	router.RegisterPathMatcher(routes.ResolveIndexPath, []string{"GET"}, always(), func(ctx context.Context, body string, _ string, params map[string]string) (*mux.Result, error) {
-		pattern := params["index"]
+		pattern := elasticsearch.NormalizePattern(params["index"])
 		if elasticsearch.IsIndexPattern(pattern) {
 			// todo avoid creating new instances all the time
 			sources, found, err := elasticsearch.NewIndexResolver(cfg.Elasticsearch.Url.String()).Resolve(pattern)
@@ -78,7 +78,7 @@ func configureRouter(cfg config.QuesmaConfiguration, lm *clickhouse.LogManager,
 			})
 			definitions.Range(
 				func(name string, table *clickhouse.Table) bool {
-					if config.MatchName(preprocessPattern(pattern), name) {
+					if config.MatchName(elasticsearch.NormalizePattern(pattern), name) {
 						sources.DataStreams = append(sources.DataStreams, elasticsearch.DataStream{
 							Name:           name,
 							BackingIndices: []string{name},
@@ -91,7 +91,7 @@ func configureRouter(cfg config.QuesmaConfiguration, lm *clickhouse.LogManager,
 
 			return resolveIndexResult(sources), nil
 		} else {
-			if config.MatchName(preprocessPattern(pattern), pattern) {
+			if config.MatchName(elasticsearch.NormalizePattern(pattern), pattern) {
 				definitions := lm.GetTableDefinitions()
 				if definitions.Has(pattern) {
 					return resolveIndexResult(elasticsearch.Sources{