diff --git a/src/test/compile-fail/issue-1802-1.rs b/src/test/compile-fail/issue-1802-1.rs
new file mode 100644
index 00000000000..b4af7c288ec
--- /dev/null
+++ b/src/test/compile-fail/issue-1802-1.rs
@@ -0,0 +1,4 @@
+// error-pattern:no valid digits found for number
+fn main() {
+    log(error, 0b42);
+}
\ No newline at end of file
diff --git a/src/test/compile-fail/issue-1802-2.rs b/src/test/compile-fail/issue-1802-2.rs
new file mode 100644
index 00000000000..5df1ba390b6
--- /dev/null
+++ b/src/test/compile-fail/issue-1802-2.rs
@@ -0,0 +1,4 @@
+// error-pattern:no valid digits found for number
+fn main() {
+    log(error, 0bu);
+}
\ No newline at end of file