diff --git a/news/5059-ci-conda-libmamba-solver b/news/5059-ci-conda-libmamba-solver
new file mode 100644
index 0000000000..daf2d919bf
--- /dev/null
+++ b/news/5059-ci-conda-libmamba-solver
@@ -0,0 +1,19 @@
+### Enhancements
+
+* <news item>
+
+### Bug fixes
+
+* <news item>
+
+### Deprecations
+
+* <news item>
+
+### Docs
+
+* <news item>
+
+### Other
+
+* Mark Unicode tests as incompatible with `libmamba`. (#5059)