diff --git a/tests/functions.bats b/tests/functions.bats
index 9847f5a..7a849eb 100644
--- a/tests/functions.bats
+++ b/tests/functions.bats
@@ -10,7 +10,7 @@
 
 @test "build image" {
   cd $BATS_TEST_DIRNAME/..
-  docker build -t $SUT_IMAGE .
+  docker_build -t $SUT_IMAGE .
 }
 
 @test "versionLT" {