diff --git a/CMakeLists.txt b/CMakeLists.txt
index c9da859..105974b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,7 +61,7 @@ ExternalProject_Add(trower-base64
     PREFIX ${CMAKE_CURRENT_BINARY_DIR}/_prefix/trower-base64
     GIT_REPOSITORY https://github.com/Comcast/trower-base64.git
     GIT_TAG "master"
-    CMAKE_ARGS += -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR}
+    CMAKE_ARGS += -DCMAKE_INSTALL_PREFIX=${INSTALL_DIR} -DBUILD_TESTING=OFF
 )
 add_library(libtrower-base64 STATIC SHARED IMPORTED)
 add_dependencies(libtrower-base64 trower-base64)