1 files changed, 7 insertions, 0 deletions
diff --git a/man/pai.Rd b/man/pai.Rd
index c27a8f5..cec3015 100644
--- a/man/pai.Rd
+++ b/man/pai.Rd
@@ -12,11 +12,18 @@ The class is initialised with an identifier which is generally an ISO common nam
 Additional chemical information is retrieved from the internet if available.
 }
 \examples{
+# On Travis, we get a certificate validation error,
+# likely because the system (xenial) is so old,
+# therefore don't run this example on Travis
+if (Sys.getenv("TRAVIS") == "") {
+
 atr <- pai$new("atrazine")
 print(atr)
 if (!is.null(atr$Picture)) {
   plot(atr)
 }
+
+}
 }
 \keyword{data}
 \section{Super class}{