diff --git a/parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java b/parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java
index 1a83c3127..0e4490aa6 100644
--- a/parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java
+++ b/parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java
@@ -31,6 +31,7 @@
 import com.google.protobuf.Descriptors.EnumDescriptor;
 import com.google.protobuf.Descriptors.FieldDescriptor;
 import com.google.protobuf.Descriptors.OneofDescriptor;
+import com.google.protobuf.TextFormat;
 import com.google.testing.junit.testparameterinjector.TestParameterInjector;
 import dev.cel.common.CelAbstractSyntaxTree;
 import dev.cel.common.CelOptions;
@@ -354,7 +355,7 @@ private void runSourceInfoTest(String expression) throws Exception {
         CelProtoAbstractSyntaxTree.fromCelAst(ast).toParsedExpr().getSourceInfo();
     testOutput().println("I: " + expression);
     testOutput().println("=====>");
-    testOutput().println("S: " + sourceInfo);
+    testOutput().println("S: " + TextFormat.printer().printToString(sourceInfo));
   }
 
   private String convertMacroCallsToString(SourceInfo sourceInfo) {