diff --git a/api/types_test.go b/api/types_test.go
index 37026685..fe301eb5 100644
--- a/api/types_test.go
+++ b/api/types_test.go
@@ -1,4 +1,4 @@
-// build unittest
+// +build unittest
 
 package api
 
diff --git a/bchain/coins/liquid/liquidparser_test.go b/bchain/coins/liquid/liquidparser_test.go
index 8a9b4a01..f7cf5a08 100644
--- a/bchain/coins/liquid/liquidparser_test.go
+++ b/bchain/coins/liquid/liquidparser_test.go
@@ -1,4 +1,4 @@
-// build unittest
+// +build unittest
 
 package liquid
 
diff --git a/db/rocksdb_ethereumtype_test.go b/db/rocksdb_ethereumtype_test.go
index 34ed2e93..8b66cc0d 100644
--- a/db/rocksdb_ethereumtype_test.go
+++ b/db/rocksdb_ethereumtype_test.go
@@ -1,4 +1,4 @@
-// build unittest
+// +build unittest
 
 package db
 
diff --git a/db/rocksdb_test.go b/db/rocksdb_test.go
index 329c96a1..a4da7f52 100644
--- a/db/rocksdb_test.go
+++ b/db/rocksdb_test.go
@@ -1,4 +1,4 @@
-// build unittest
+// +build unittest
 
 package db