diff --git a/tests/rustdoc/anchor-id-duplicate-method-name-25001.rs b/tests/rustdoc/anchor-id-duplicate-method-name-25001.rs
index d20268f176cec..ffb0765d3c3f6 100644
--- a/tests/rustdoc/anchor-id-duplicate-method-name-25001.rs
+++ b/tests/rustdoc/anchor-id-duplicate-method-name-25001.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/25001
 #![crate_name="issue_25001"]
 
 // @has issue_25001/struct.Foo.html
diff --git a/tests/rustdoc/anchor-id-trait-tymethod-28478.rs b/tests/rustdoc/anchor-id-trait-tymethod-28478.rs
index 60ba9090f71db..5685040dc1e1b 100644
--- a/tests/rustdoc/anchor-id-trait-tymethod-28478.rs
+++ b/tests/rustdoc/anchor-id-trait-tymethod-28478.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/28478
 #![crate_name="issue_28478"]
 
 #![feature(associated_type_defaults)]
diff --git a/tests/rustdoc/deduplicate-glob-import-impl-21474.rs b/tests/rustdoc/deduplicate-glob-import-impl-21474.rs
index bedf89236aae2..2a675b4b6ef54 100644
--- a/tests/rustdoc/deduplicate-glob-import-impl-21474.rs
+++ b/tests/rustdoc/deduplicate-glob-import-impl-21474.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/21474
 #![crate_name="issue_21474"]
 
 pub use inner::*;
diff --git a/tests/rustdoc/deduplicate-trait-impl-22025.rs b/tests/rustdoc/deduplicate-trait-impl-22025.rs
index d01c1f5c427b9..65a556e3a70f1 100644
--- a/tests/rustdoc/deduplicate-trait-impl-22025.rs
+++ b/tests/rustdoc/deduplicate-trait-impl-22025.rs
@@ -1,6 +1,7 @@
 // aux-build:issue-22025.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/22025
 #![crate_name="issue_22025"]
 
 extern crate issue_22025;
diff --git a/tests/rustdoc/doctest-hide-empty-line-23106.rs b/tests/rustdoc/doctest-hide-empty-line-23106.rs
index 27c0bd0913045..8e1e2cf098cf2 100644
--- a/tests/rustdoc/doctest-hide-empty-line-23106.rs
+++ b/tests/rustdoc/doctest-hide-empty-line-23106.rs
@@ -1,5 +1,6 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/23106
 #![crate_name="issue_23106"]
 
 /// ```
diff --git a/tests/rustdoc/doctest-markdown-inline-parse-23744.rs b/tests/rustdoc/doctest-markdown-inline-parse-23744.rs
index 45cc1bf3f4142..128e2daba071a 100644
--- a/tests/rustdoc/doctest-markdown-inline-parse-23744.rs
+++ b/tests/rustdoc/doctest-markdown-inline-parse-23744.rs
@@ -1,5 +1,6 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/23744
 #![crate_name="issue_23744"]
 
 /// Example of rustdoc incorrectly parsing <code>```rust,should_panic</code>.
diff --git a/tests/rustdoc/doctest-multi-line-string-literal-25944.rs b/tests/rustdoc/doctest-multi-line-string-literal-25944.rs
index 17f3431593024..eec796e4fbf29 100644
--- a/tests/rustdoc/doctest-multi-line-string-literal-25944.rs
+++ b/tests/rustdoc/doctest-multi-line-string-literal-25944.rs
@@ -1,5 +1,6 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/25944
 #![crate_name="issue_25944"]
 
 /// ```
diff --git a/tests/rustdoc/extern-fn-22038.rs b/tests/rustdoc/extern-fn-22038.rs
index 52c9280f82676..72d39c32a1c64 100644
--- a/tests/rustdoc/extern-fn-22038.rs
+++ b/tests/rustdoc/extern-fn-22038.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/22038
 #![crate_name="issue_22038"]
 
 extern "C" {
diff --git a/tests/rustdoc/ice-reexport-crate-root-28927.rs b/tests/rustdoc/ice-reexport-crate-root-28927.rs
index ca07add2ba8da..26debfc60e464 100644
--- a/tests/rustdoc/ice-reexport-crate-root-28927.rs
+++ b/tests/rustdoc/ice-reexport-crate-root-28927.rs
@@ -2,6 +2,7 @@
 // aux-build:issue-28927-1.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/28927
 #![crate_name="issue_28927"]
 
 pub extern crate issue_28927_1 as inner1;
diff --git a/tests/rustdoc/impl-assoc-type-21092.rs b/tests/rustdoc/impl-assoc-type-21092.rs
index 214be755e94f5..f01f098a92f5d 100644
--- a/tests/rustdoc/impl-assoc-type-21092.rs
+++ b/tests/rustdoc/impl-assoc-type-21092.rs
@@ -1,6 +1,7 @@
 // aux-build:issue-21092.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/21092
 #![crate_name="issue_21092"]
 
 extern crate issue_21092;
diff --git a/tests/rustdoc/inline_cross/const-fn-27362.rs b/tests/rustdoc/inline_cross/const-fn-27362.rs
index d2e8879dd25f5..39b904662e065 100644
--- a/tests/rustdoc/inline_cross/const-fn-27362.rs
+++ b/tests/rustdoc/inline_cross/const-fn-27362.rs
@@ -1,6 +1,7 @@
 // aux-build:issue-27362-aux.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/27362
 #![crate_name="issue_27362"]
 
 extern crate issue_27362_aux;
diff --git a/tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs b/tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs
index 24cba4ad2942b..4e9596db589e2 100644
--- a/tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs
+++ b/tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs
@@ -2,6 +2,7 @@
 // aux-build:issue-23207-2.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/23207
 #![crate_name="issue_23207"]
 
 extern crate issue_23207_2;
diff --git a/tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs b/tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs
index 131bf38c3cb75..bcbb2e9f4088e 100644
--- a/tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs
+++ b/tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs
@@ -1,6 +1,7 @@
 // aux-build:issue-21801.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/21801
 #![crate_name="issue_21801"]
 
 extern crate issue_21801;
diff --git a/tests/rustdoc/macro-doc-comment-23812.rs b/tests/rustdoc/macro-doc-comment-23812.rs
index 43b422fc9928e..57c18510b1e05 100644
--- a/tests/rustdoc/macro-doc-comment-23812.rs
+++ b/tests/rustdoc/macro-doc-comment-23812.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/23812
 #![crate_name="issue_23812"]
 
 macro_rules! doc {
diff --git a/tests/rustdoc/markdown-table-escape-pipe-27862.rs b/tests/rustdoc/markdown-table-escape-pipe-27862.rs
index 19adcb9450802..9af75d248884a 100644
--- a/tests/rustdoc/markdown-table-escape-pipe-27862.rs
+++ b/tests/rustdoc/markdown-table-escape-pipe-27862.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/27862
 #![crate_name="issue_27862"]
 
 /// Tests  | Table
diff --git a/tests/rustdoc/search-index-primitive-inherent-method-23511.rs b/tests/rustdoc/search-index-primitive-inherent-method-23511.rs
index d6b931850e2b5..1d0fe27e19273 100644
--- a/tests/rustdoc/search-index-primitive-inherent-method-23511.rs
+++ b/tests/rustdoc/search-index-primitive-inherent-method-23511.rs
@@ -2,6 +2,7 @@
 #![feature(rustdoc_internals)]
 #![no_std]
 
+// https://github.com/rust-lang/rust/issues/23511
 #![crate_name="issue_23511"]
 
 pub mod str {
diff --git a/tests/rustdoc/src-link-external-macro-26606.rs b/tests/rustdoc/src-link-external-macro-26606.rs
index 4cd735b38712f..de717a5273bb9 100644
--- a/tests/rustdoc/src-link-external-macro-26606.rs
+++ b/tests/rustdoc/src-link-external-macro-26606.rs
@@ -2,6 +2,7 @@
 // ignore-cross-compile
 // build-aux-docs
 
+// https://github.com/rust-lang/rust/issues/26606
 #![crate_name="issue_26606"]
 
 // @has issue_26606_macro/macro.make_item.html
@@ -9,5 +10,5 @@
 extern crate issue_26606_macro;
 
 // @has issue_26606/constant.FOO.html
-// @has - '//a[@href="../src/issue_26606/src-link-external-macro-26606.rs.html#13"]' 'source'
+// @has - '//a[@href="../src/issue_26606/src-link-external-macro-26606.rs.html#14"]' 'source'
 make_item!(FOO);
diff --git a/tests/rustdoc/src-mod-path-absolute-26995.rs b/tests/rustdoc/src-mod-path-absolute-26995.rs
index e2cad215d6775..b67fd9b26db4b 100644
--- a/tests/rustdoc/src-mod-path-absolute-26995.rs
+++ b/tests/rustdoc/src-mod-path-absolute-26995.rs
@@ -1,6 +1,7 @@
 // ignore-windows
 // compile-flags: --no-defaults
 
+// https://github.com/rust-lang/rust/issues/26995
 #![crate_name="issue_26995"]
 
 // @has src/issue_26995/dev/null.html
diff --git a/tests/rustdoc/staged-api-feature-issue-27759.rs b/tests/rustdoc/staged-api-feature-issue-27759.rs
index 28ea515d81f44..56a45a600da61 100644
--- a/tests/rustdoc/staged-api-feature-issue-27759.rs
+++ b/tests/rustdoc/staged-api-feature-issue-27759.rs
@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/27759
 #![crate_name="issue_27759"]
 
 #![feature(staged_api)]
diff --git a/tests/rustdoc/strip-priv-imports-pass-27104.rs b/tests/rustdoc/strip-priv-imports-pass-27104.rs
index 220df629686ef..e400a8f501181 100644
--- a/tests/rustdoc/strip-priv-imports-pass-27104.rs
+++ b/tests/rustdoc/strip-priv-imports-pass-27104.rs
@@ -2,6 +2,7 @@
 // aux-build:empty.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/27104
 #![crate_name="issue_27104"]
 
 // @has issue_27104/index.html