diff --git a/test/pdfs/issue1597.pdf.link b/test/pdfs/issue1597.pdf.link
index 94d54084e..58de2e8d5 100644
--- a/test/pdfs/issue1597.pdf.link
+++ b/test/pdfs/issue1597.pdf.link
@@ -1 +1 @@
-http://content1d.omroep.nl/227cbd4ae54f95dd466a7a8475fec2ea/4f95b377/nos/docs/230412_brief_koningin.pdf
+https://web.archive.org/web/20151126034816/https://www.rijksoverheid.nl/binaries/rijksoverheid/documenten/brieven/2012/04/23/afschrift-brief-aan-koning-beatrix-over-ontslag-kabinet/afschrift-brief-aan-koningin-beatrix-over-ontslag-kabinet.pdf
diff --git a/test/pdfs/issue2627.pdf.link b/test/pdfs/issue2627.pdf.link
index b2e5994ef..295beaa46 100644
--- a/test/pdfs/issue2627.pdf.link
+++ b/test/pdfs/issue2627.pdf.link
@@ -1 +1 @@
-http://borel.slu.edu/pub/metanet.pdf
+https://web.archive.org/web/20160117120444/http://borel.slu.edu/pub/metanet.pdf
diff --git a/test/pdfs/kdchart.pdf.link b/test/pdfs/kdchart.pdf.link
index 924cf23d1..4dd348f44 100644
--- a/test/pdfs/kdchart.pdf.link
+++ b/test/pdfs/kdchart.pdf.link
@@ -1 +1 @@
-http://manager.ics.com/files/datasheets/kdchart.pdf
+https://web.archive.org/web/20160117133330/http://www.pdf-archive.com/2016/01/17/kdchart-1/kdchart-1.pdf