diff --git a/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/build.sbt b/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/build.sbt
index bffbe83..c4cfb1c 100644
--- a/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/build.sbt
+++ b/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/build.sbt
@@ -4,7 +4,7 @@ val checkMapFileContents = taskKey[Unit]("check that map contents are correct")
 
 checkMapFileContents := {
   val contents = IO.read((Assets / WebKeys.public).value / "css" / "main.min.css.map")
-  val expectedContents = """{"version":3,"sources":["main.less"],"names":[],"mappings":"AAAA,GACE","file":"main.min.css"}"""
+  val expectedContents = """{"version":3,"sources":["main.less"],"names":[],"mappings":"AAGA,GACE,UAAA,CACA,IAAK","file":"main.min.css"}"""
 
   if (contents != expectedContents) {
     sys.error(s"Unexpected contents: $contents, \nexpected: $expectedContents")
diff --git a/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/src/main/assets/css/main.less b/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/src/main/assets/css/main.less
index 34fb9ac..c773cb6 100644
--- a/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/src/main/assets/css/main.less
+++ b/src/sbt-test/sbt-less-plugin/less-same-webjars-different-version/src/main/assets/css/main.less
@@ -1,3 +1,7 @@
+@li-vspace: 1.7rem;
+@icon-size: 2rem;
+
 h1 {
-  color: blue
-}
\ No newline at end of file
+  color: blue;
+  top: calc(-@li-vspace + @icon-size / 2 - 5px);
+}