diff --git a/test/runtests.jl b/test/runtests.jl
index 166aef8..708edaa 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,4 +1,6 @@
 Pkg.add("Cairo")  # Tests apt-get code paths
 using Cairo
 Pkg.add("HttpParser")  # Tests build-from-source code paths
-using HttpParser
\ No newline at end of file
+using HttpParser
+Pkg.add("ECOS")  # Build-from-source
+Pkg.build("ECOS")  # Double-build it