diff --git a/for_tests/Dockerfile b/for_tests/Dockerfile
index 4382f7039ae12343ab9c98d6d1de14e630d385d6..ec961d18db2c3d932f4343b952d916f5ad99d140 100644
--- a/for_tests/Dockerfile
+++ b/for_tests/Dockerfile
@@ -50,6 +50,7 @@ RUN apt-get install -y cmake &&\
 
 
 # Install mafft 7.313
+RUN rm /usr/bin/mafft  # remove mafft installed with bioperl
 WORKDIR /tmp
 RUN wget https://mafft.cbrc.jp/alignment/software/mafft-7.313-with-extensions-src.tgz &&\
     tar xf mafft-7.313-with-extensions-src.tgz &&\