diff --git a/unittests/instring_eval.chai b/unittests/instring_eval.chai
new file mode 100644
index 0000000..39fbd17
--- /dev/null
+++ b/unittests/instring_eval.chai
@@ -0,0 +1,3 @@
+var bob = 5.5
+print("${bob}")
+print("val: ${5.5 + 2.5} and ${bob + 2.5}")
diff --git a/unittests/instring_eval.txt b/unittests/instring_eval.txt
new file mode 100644
index 0000000..874e6c7
--- /dev/null
+++ b/unittests/instring_eval.txt
@@ -0,0 +1,2 @@
+5.5
+val: 8 and 8