diff --git a/Sources/PostgREST/PostgrestClient.swift b/Sources/PostgREST/PostgrestClient.swift
index 95de76b..276d1b9 100644
--- a/Sources/PostgREST/PostgrestClient.swift
+++ b/Sources/PostgREST/PostgrestClient.swift
@@ -127,13 +127,13 @@ struct PostgrestAPIClientDelegate: APIClientDelegate {
   }
 
   private func query(_ parameters: [(String, String?)]) -> String {
-    parameters.compactMap { key, value in
+    parameters.compactMap { key, value -> (String, String)? in
       if let value {
         return (key, value)
       }
       return nil
     }
-    .map { key, value in
+    .map { key, value -> String in
       let escapedKey = escape(key)
       let escapedValue = escape(value)
       return "\(escapedKey)=\(escapedValue)"
diff --git a/Tests/PostgRESTTests/BuildURLRequestTests.swift b/Tests/PostgRESTTests/BuildURLRequestTests.swift
index 2efee51..b5e1e78 100644
--- a/Tests/PostgRESTTests/BuildURLRequestTests.swift
+++ b/Tests/PostgRESTTests/BuildURLRequestTests.swift
@@ -96,7 +96,7 @@
             .select()
             .gt(column: "received_at", value: "2023-03-23T15:50:30.511743+00:00")
             .order(column: "received_at")
-        }
+        },
       ]
 
       for testCase in testCases {