diff --git a/regression_testing/cases/github-cases/case-523.conf b/regression_testing/cases/github-cases/case-523.conf
new file mode 100755
index 0000000..dd7818a
--- /dev/null
+++ b/regression_testing/cases/github-cases/case-523.conf
@@ -0,0 +1,4 @@
+# Config for test case.
+tidy-mark: no
+indent: no
+wrap: 99999
diff --git a/regression_testing/cases/github-cases/case-523@1.html b/regression_testing/cases/github-cases/case-523@1.html
new file mode 100644
index 0000000..fec3c7f
--- /dev/null
+++ b/regression_testing/cases/github-cases/case-523@1.html
@@ -0,0 +1,28 @@
+
+
+
+
+test
+
+
+
+
+Hello
+
+
+
+This is a block level element, and as such, is capable of inlining inline elements. Scripts are inline elements, so this script should be included in the flow.
+
+
+This is another paragraph with an 
tag inline.
+
+
+
diff --git a/regression_testing/cases/github-expects/case-523.html b/regression_testing/cases/github-expects/case-523.html
new file mode 100644
index 0000000..eae4782
--- /dev/null
+++ b/regression_testing/cases/github-expects/case-523.html
@@ -0,0 +1,27 @@
+
+
+
+
+test
+
+
+
+
+Hello
+
+
+This is a block level element, and as such, is capable of inlining inline elements.
+ Scripts are inline elements, so this script should be included in the flow.
+
+
+
+This is another paragraph with an tag inline.
+
+
+
diff --git a/regression_testing/cases/github-expects/case-523.txt b/regression_testing/cases/github-expects/case-523.txt
new file mode 100644
index 0000000..f31fab1
--- /dev/null
+++ b/regression_testing/cases/github-expects/case-523.txt
@@ -0,0 +1,26 @@
+line 19 column 1 - Warning: ![]()
lacks "alt" attribute
+line 23 column 41 - Warning: ![]()
lacks "alt" attribute
+line 25 column 38 - Warning: ![]()
lacks "alt" attribute
+line 26 column 1 - Warning: ![]()
lacks "alt" attribute
+line 26 column 20 - Warning: ![]()
lacks "alt" attribute
+line 26 column 39 - Warning: ![]()
lacks "alt" attribute
+Info: Document content looks like HTML5
+Tidy found 6 warnings and 0 errors!
+
+The alt attribute should be used to give a short description
+of an image; longer descriptions should be given with the
+longdesc attribute which takes a URL linked to the description.
+These measures are needed for people using non-graphical browsers.
+
+For further advice on how to make your pages accessible
+see https://www.w3.org/WAI/GL.
+About HTML Tidy: https://github.com/htacg/tidy-html5
+Bug reports and comments: https://github.com/htacg/tidy-html5/issues
+Official mailing list: https://lists.w3.org/Archives/Public/public-htacg/
+Latest HTML specification: https://html.spec.whatwg.org/multipage/
+Validate your HTML documents: https://validator.w3.org/nu/
+Lobby your company to join the W3C: https://www.w3.org/Consortium
+
+Do you speak a language other than English, or a different variant of
+English? Consider helping us to localize HTML Tidy. For details please see
+https://github.com/htacg/tidy-html5/blob/master/README/LOCALIZE.md
diff --git a/regression_testing/cases/legacy-expects/case-443678.html b/regression_testing/cases/legacy-expects/case-443678.html
index d27f241..61c6336 100644
--- a/regression_testing/cases/legacy-expects/case-443678.html
+++ b/regression_testing/cases/legacy-expects/case-443678.html
@@ -18,7 +18,7 @@
- Just a test.
+ Just a test.