diff --git a/rust/pact_matching/src/json.rs b/rust/pact_matching/src/json.rs
index ff08bff96..a95815328 100644
--- a/rust/pact_matching/src/json.rs
+++ b/rust/pact_matching/src/json.rs
@@ -257,7 +257,7 @@ impl Matches<&Value> for Value {
       },
       MatchingRule::ContentType(ref expected_content_type) => {
         match_content_type(&convert_data(actual), expected_content_type)
-          .map_err(|err| anyhow!("Expected data to have a content type of '{}' but was {}", expected_content_type, err))
+          .map_err(|err| anyhow!("Failed to match data to have a content type of '{}': {}", expected_content_type, err))
       }
       MatchingRule::Boolean => match actual {
         Value::Bool(_) => Ok(()),
diff --git a/rust/pact_matching/src/matchingrules.rs b/rust/pact_matching/src/matchingrules.rs
index 3eb51e3c5..93b631630 100644
--- a/rust/pact_matching/src/matchingrules.rs
+++ b/rust/pact_matching/src/matchingrules.rs
@@ -148,7 +148,7 @@ impl Matches<&[u8]> for Vec<u8> {
       }
       MatchingRule::ContentType(ref expected_content_type) => {
         match_content_type(actual, expected_content_type)
-          .map_err(|err| anyhow!("Expected data to have a content type of '{}' but was {}", expected_content_type, err))
+          .map_err(|err| anyhow!("Failed to match data to have a content type of '{}': {}", expected_content_type, err))
       }
       MatchingRule::NotEmpty => {
         if actual.is_empty() {