diff --git a/tests-extra/Dockerfile b/tests-extra/Dockerfile
index c8120b00f0f37e4df29fd2527ebc277780d8c539..84f616f466a8caccab0bd1309369e12df971b8d9 100644
--- a/tests-extra/Dockerfile
+++ b/tests-extra/Dockerfile
@@ -20,7 +20,7 @@ RUN mkdir /tests; \
 # Link the tested executables
 mkdir /src; \
 ln -sfn /usr/local/sbin/knotd /src/knotd; \
-ln -sfn /usr/local/bin/knotc /src/knotc; \
+ln -sfn /usr/local/bin/knotc /src/knotc
 
 # Select entrypoint
 WORKDIR /tests