diff --git a/internal/tsoptions/parsinghelpers.go b/internal/tsoptions/parsinghelpers.go
index 452883e37d..a527c391cb 100644
--- a/internal/tsoptions/parsinghelpers.go
+++ b/internal/tsoptions/parsinghelpers.go
@@ -143,6 +143,8 @@ func ParseCompilerOptions(key string, value any, allOptions *core.CompilerOption
 	switch key {
 	case "allowJs":
 		allOptions.AllowJs = parseTristate(value)
+	case "allowImportingTsExtensions":
+		allOptions.AllowImportingTsExtensions = parseTristate(value)
 	case "allowSyntheticDefaultImports":
 		allOptions.AllowSyntheticDefaultImports = parseTristate(value)
 	case "allowNonTsExtensions":
@@ -185,6 +187,12 @@ func ParseCompilerOptions(key string, value any, allOptions *core.CompilerOption
 		allOptions.DeclarationMap = parseTristate(value)
 	case "declaration":
 		allOptions.Declaration = parseTristate(value)
+	case "downlevelIteration":
+		allOptions.DownlevelIteration = parseTristate(value)
+	case "emitDeclarationOnly":
+		allOptions.EmitDeclarationOnly = parseTristate(value)
+	case "eSModuleInterop":
+		allOptions.ESModuleInterop = parseTristate(value)
 	case "extendedDiagnostics":
 		allOptions.ExtendedDiagnostics = parseTristate(value)
 	case "emitDecoratorMetadata":
@@ -261,6 +269,8 @@ func ParseCompilerOptions(key string, value any, allOptions *core.CompilerOption
 		allOptions.NoFallthroughCasesInSwitch = parseTristate(value)
 	case "noEmitForJsFiles":
 		allOptions.NoEmitForJsFiles = parseTristate(value)
+	case "noErrorTruncation":
+		allOptions.NoErrorTruncation = parseTristate(value)
 	case "noImplicitAny":
 		allOptions.NoImplicitAny = parseTristate(value)
 	case "noImplicitThis":
@@ -311,6 +321,8 @@ func ParseCompilerOptions(key string, value any, allOptions *core.CompilerOption
 		allOptions.ResolvePackageJsonImports = parseTristate(value)
 	case "reactNamespace":
 		allOptions.ReactNamespace = parseString(value)
+	case "rewriteRelativeImportExtensions":
+		allOptions.RewriteRelativeImportExtensions = parseTristate(value)
 	case "rootDir":
 		allOptions.RootDir = parseString(value)
 	case "rootDirs":
diff --git a/internal/tsoptions/parsinghelpers_test.go b/internal/tsoptions/parsinghelpers_test.go
new file mode 100644
index 0000000000..f80879d5ff
--- /dev/null
+++ b/internal/tsoptions/parsinghelpers_test.go
@@ -0,0 +1,36 @@
+package tsoptions
+
+import (
+	"github.com/microsoft/typescript-go/internal/core"
+	"reflect"
+	"testing"
+	"unicode"
+)
+
+func TestParseCompilerOptions_noMissingTristates(t *testing.T) {
+	var missingKeys []string
+
+	for _, field := range reflect.VisibleFields(reflect.TypeFor[core.CompilerOptions]()) {
+		// The key name in ParseCompilerOptions has the first rune in lowercase
+		r := []rune(field.Name)
+		r[0] = unicode.ToLower(r[0])
+		keyName := string(r)
+
+		isTristate := field.Type == reflect.TypeFor[core.Tristate]()
+		if isTristate {
+			// Set the field on a CompilerOptions to something other than the
+			// default (i.e. TSTrue != TSUnknown), then check whether
+			// ParseCompilerOptions does actually update the value for that key.
+			testValue := core.TSTrue
+			co := core.CompilerOptions{}
+			ParseCompilerOptions(keyName, testValue, &co)
+			newSetValue := reflect.ValueOf(co).FieldByName(field.Name)
+			if !newSetValue.Equal(reflect.ValueOf(testValue)) {
+				missingKeys = append(missingKeys, keyName)
+			}
+		}
+	}
+	if len(missingKeys) > 0 {
+		t.Errorf("The following Tristate keys are missing entries in the ParseCompilerOptions switch statement:\n%v", missingKeys)
+	}
+}