diff --git a/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/RawRepresentable.qll b/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/RawRepresentable.qll
index 8d56ffb4dfd..bbd583a32a4 100644
--- a/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/RawRepresentable.qll
+++ b/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/RawRepresentable.qll
@@ -12,7 +12,11 @@ private import codeql.swift.dataflow.FlowSteps
  */
 private class RawRepresentableSummaries extends SummaryModelCsv {
   override predicate row(string row) {
-    row = ";RawRepresentable;true;init(rawValue:);;;Argument[0];ReturnValue;taint"
+    row =
+      [
+        ";RawRepresentable;true;init(rawValue:);;;Argument[0];ReturnValue;taint",
+        ";OptionSet;true;init(rawValue:);;;Argument[0];ReturnValue;taint"
+      ]
   }
 }
 
diff --git a/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/String.qll b/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/String.qll
index b773177f152..0642003923b 100644
--- a/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/String.qll
+++ b/swift/ql/lib/codeql/swift/frameworks/StandardLibrary/String.qll
@@ -167,7 +167,7 @@ private class StringFieldsInheritTaint extends TaintInheritingContent,
             "precomposedStringWithCompatibilityMapping", "removingPercentEncoding"
           ]
         or
-        namedTypeDecl.getFullName() = "CustomStringConvertible" and
+        namedTypeDecl.getFullName() = ["CustomStringConvertible", "BinaryInteger"] and
         fieldDecl.getName() = "description"
         or
         namedTypeDecl.getFullName() = "CustomDebugStringConvertible" and
diff --git a/swift/ql/test/library-tests/dataflow/taint/libraries/TaintInline.expected b/swift/ql/test/library-tests/dataflow/taint/libraries/TaintInline.expected
index 5fcb458d4fc..8ec8033d086 100644
--- a/swift/ql/test/library-tests/dataflow/taint/libraries/TaintInline.expected
+++ b/swift/ql/test/library-tests/dataflow/taint/libraries/TaintInline.expected
@@ -1,5 +1,2 @@
 testFailures
-| optionset.swift:60:49:61:1 | // $ tainted=60\n | Missing result: tainted=60 |
-| optionset.swift:65:58:66:1 | // $ tainted=65\n | Missing result: tainted=65 |
-| string.swift:599:35:600:1 | // $ tainted=599\n | Missing result: tainted=599 |
 failures