diff --git a/test/fixtures/remarkable/sub.txt b/test/fixtures/remarkable/sub.txt
new file mode 100644
index 0000000..240714e
--- /dev/null
+++ b/test/fixtures/remarkable/sub.txt
@@ -0,0 +1,12 @@
+
+.
+~foo ~bar~ baz~
+.
+<p><sup>foo <sup>bar</sup> baz</sup></p>
+.
+
+.
+this ~ is ~ not ~ subscript
+.
+<p>this ~ is ~ not ~ subscript</p>
+.
diff --git a/test/fixtures/remarkable/sup.txt b/test/fixtures/remarkable/sup.txt
new file mode 100644
index 0000000..1984017
--- /dev/null
+++ b/test/fixtures/remarkable/sup.txt
@@ -0,0 +1,18 @@
+
+.
+^foo ^bar^ baz^
+.
+<p><sup>foo <sup>bar</sup> baz</sup></p>
+.
+
+.
+^foo ~bar~ baz^
+.
+<p><sup>foo <sub>bar</sub> baz</sup></p>
+.
+
+.
+this ^ is ^ not ^ superscript
+.
+<p>this ^ is ^ not ^ superscript</p>
+.