diff --git a/travis/Dockerfile.centos6 b/travis/Dockerfile.centos6
index 7d81dfb..90578b4 100644
--- a/travis/Dockerfile.centos6
+++ b/travis/Dockerfile.centos6
@@ -20,3 +20,5 @@ RUN yum install -y gcc-c++ && \
     make install && \
     popd && \
     rm -r patchelf/
+
+CMD ["bash"]
diff --git a/travis/Dockerfile.centos6-i386 b/travis/Dockerfile.centos6-i386
index 407c414..6c762c9 100644
--- a/travis/Dockerfile.centos6-i386
+++ b/travis/Dockerfile.centos6-i386
@@ -41,3 +41,4 @@ RUN yum install -y gcc-c++ && \
     popd && \
     rm -r patchelf/
 
+CMD ["bash"]