diff --git a/test/pdfs/issue2129.pdf.link b/test/pdfs/issue2129.pdf.link
index cc8c26db..c4834542 100644
--- a/test/pdfs/issue2129.pdf.link
+++ b/test/pdfs/issue2129.pdf.link
@@ -1 +1 @@
-http://docs.dpaq.de/1737-itcsamsungapple337_794notice14092012.pdf
+http://web.archive.org/web/20160116110533/http://docs.dpaq.de/1737-itcsamsungapple337_794notice14092012.pdf
diff --git a/test/pdfs/issue2139.pdf.link b/test/pdfs/issue2139.pdf.link
index 146724d1..919432c9 100644
--- a/test/pdfs/issue2139.pdf.link
+++ b/test/pdfs/issue2139.pdf.link
@@ -1 +1 @@
-http://www.cs.wustl.edu/~cytron/cse547/PDFs/p1.pdf
+http://web.archive.org/web/20130124003705/http://www.cs.wustl.edu/~cytron/cse547/PDFs/p1.pdf
diff --git a/test/pdfs/issue2386.pdf.link b/test/pdfs/issue2386.pdf.link
index 75be8b1f..bfdc1ad9 100644
--- a/test/pdfs/issue2386.pdf.link
+++ b/test/pdfs/issue2386.pdf.link
@@ -1 +1 @@
-http://www-support-downloads.sonymobile.com/st25/userguide_EN_ST25_1263-3851.1.pdf
+http://web.archive.org/web/20150429030420/http://www-support-downloads.sonymobile.com/st25/userguide_EN_ST25_1263-3851.1.pdf
diff --git a/test/pdfs/issue2442.pdf.link b/test/pdfs/issue2442.pdf.link
index 195d71f3..88038cdf 100644
--- a/test/pdfs/issue2442.pdf.link
+++ b/test/pdfs/issue2442.pdf.link
@@ -1 +1 @@
-https://401k.fidelity.com/static/dcl/shared/documents/WPS_PublicSite/Documents/403b_DistributionForm_441802.pdf
+http://web.archive.org/web/20120913052936/https://401k.fidelity.com/static/dcl/shared/documents/WPS_PublicSite/Documents/403b_DistributionForm_441802.pdf
diff --git a/test/pdfs/issue2531.pdf.link b/test/pdfs/issue2531.pdf.link
index 70f40062..5a924d7f 100644
--- a/test/pdfs/issue2531.pdf.link
+++ b/test/pdfs/issue2531.pdf.link
@@ -1 +1 @@
-http://www.rcjohnso.com/Looper/Looper.pdf
+http://web.archive.org/web/20150226122507/http://www.rcjohnso.com/Looper/Looper.pdf