diff --git a/cases/testbase-expects/case-848.html b/cases/testbase-expects/case-848.html
new file mode 100644
index 0000000..0096d91
--- /dev/null
+++ b/cases/testbase-expects/case-848.html
@@ -0,0 +1,18 @@
+
+
+
+
+add 'slot' tag
+
+
+My default text
+Let's have some different
+text!
+
+
+- Let's have some different text!
+- In a list!
+
+
+
+
diff --git a/cases/testbase-expects/case-848.txt b/cases/testbase-expects/case-848.txt
new file mode 100644
index 0000000..0d4c82c
--- /dev/null
+++ b/cases/testbase-expects/case-848.txt
@@ -0,0 +1,13 @@
+Info: Document content looks like HTML5
+No warnings or errors were found.
+
+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: http://dev.w3.org/html5/spec-author-view/
+Validate your HTML documents: http://validator.w3.org/nu/
+Lobby your company to join the W3C: http://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/cases/testbase/_manifest.txt b/cases/testbase/_manifest.txt
index c903ac7..3d1f6bd 100644
--- a/cases/testbase/_manifest.txt
+++ b/cases/testbase/_manifest.txt
@@ -238,3 +238,4 @@
476a 1
476b 1
629 1
+848 0
diff --git a/cases/testbase/case-848.conf b/cases/testbase/case-848.conf
new file mode 100644
index 0000000..fbd9c18
--- /dev/null
+++ b/cases/testbase/case-848.conf
@@ -0,0 +1 @@
+new-blocklevel-tags: my-paragraph
diff --git a/cases/testbase/case-848.html b/cases/testbase/case-848.html
new file mode 100644
index 0000000..e8b4902
--- /dev/null
+++ b/cases/testbase/case-848.html
@@ -0,0 +1,21 @@
+
+
+
+
+ add 'slot' tag
+
+
+ My default text
+
+
+ Let's have some different text!
+
+
+
+
+ - Let's have some different text!
+ - In a list!
+
+
+
+