try downloading with curl

cpsievert · cpsievert · commit 4d863a6b572e · 2016-04-01T14:47:07.000+11:00
diff --git a/tests/testthat.R b/tests/testthat.R
@@ -33,7 +33,8 @@ if (report_diffs || build_table) {
     )
     download.file(
       "https://raw.githubusercontent.com/ropensci/plotly/master/inst/htmlwidgets/lib/plotlyjs/plotly-latest.min.js", 
-      file.path(table_dir, "template", "Old.min.js")
+      file.path(table_dir, "template", "Old.min.js"),
+      method = "curl"
     )
     # directory for placing test differences
     this_dir <- file.path(table_dir, this_hash)

Original file line number	Diff line number	Diff line change
`@@ -33,7 +33,8 @@ if (report_diffs \|\| build_table) {`
`33`	`33`	`)`
`34`	`34`	`download.file(`
`35`	`35`	`"https://raw.githubusercontent.com/ropensci/plotly/master/inst/htmlwidgets/lib/plotlyjs/plotly-latest.min.js",`
`36`		`- file.path(table_dir, "template", "Old.min.js")`
	`36`	`+ file.path(table_dir, "template", "Old.min.js"),`
	`37`	`+ method = "curl"`
`37`	`38`	`)`
`38`	`39`	`# directory for placing test differences`
`39`	`40`	`this_dir <- file.path(table_dir, this_hash)`