diff --git a/CHANGELOG.md b/CHANGELOG.md
index f76d674..6215dad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## UNRELEASED
 
+- FEATURE: `contains()` checks multiple block with matching selectors.
+  [#243](https://github.com/oddbird/true/pull/243)
 - 🏠 INTERNAL: Remove documentation from npm package
 
 ## 7.0.0-beta.0 (09/16/22)
@@ -12,8 +14,6 @@
     path (or string), 3) optional Sass options
 - BREAKING: Require `sass` as a peer-dependency, removing True `sass` option
 - BREAKING: Drop support for node < 14.15.0
-- FEATURE: `contains()` checks multiple block with matching selectors.
-  [#243](https://github.com/oddbird/true/pull/243)
 - INTERNAL: Use both Jest and Mocha for internal testing
 - INTERNAL: Update dependencies
 
diff --git a/src/index.ts b/src/index.ts
index 74d3271..bf503f5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -227,7 +227,10 @@ const contains = function (output: string, expected: string) {
       const expectedProperties = block.output
         .split(';')
         .map((propertyValuePair) => propertyValuePair.trim())
-        .filter((innerBlock) => innerBlock !== ' {' && innerBlock !== '}');
+        .filter(
+          (innerBlock) =>
+            innerBlock && innerBlock !== ' {' && innerBlock !== '}',
+        );
 
       // This is the assertion itself!
       return expectedProperties.every((property) =>