diff --git a/tests/testthat.R b/tests/testthat.R
index b6e27f5..9867d08 100644
--- a/tests/testthat.R
+++ b/tests/testthat.R
@@ -1,6 +1,5 @@
 library(testthat)
 library(FRASER)
-library(BiocManager)
 
 # to speed up the testing on windows do it in serial mode
 if(.Platform$OS.type != "unix") {
diff --git a/tests/testthat/test_updateSeqlevelsStyle.R b/tests/testthat/test_updateSeqlevelsStyle.R
index 7ddbf91..88c6e8c 100644
--- a/tests/testthat/test_updateSeqlevelsStyle.R
+++ b/tests/testthat/test_updateSeqlevelsStyle.R
@@ -5,6 +5,10 @@ if (!require("BiocManager", quietly = TRUE))
 library(BiocManager)
 
 test_that("hg38, UCSC to NCBI", {
+  if (!require("BiocManager", quietly = TRUE))
+    install.packages("BiocManager")
+  library(BiocManager)
+
   BiocManager::install("BSgenome.Hsapiens.UCSC.hg38")
   genome <- getBSgenome("hg38")
   bsgenome <- genome