diff --git a/jrunner/src/main/java/jrunner/jrunner.java b/jrunner/src/main/java/jrunner/jrunner.java
index f786052..53efd93 100644
--- a/jrunner/src/main/java/jrunner/jrunner.java
+++ b/jrunner/src/main/java/jrunner/jrunner.java
@@ -311,6 +311,14 @@ public class jrunner {
                 nr = "";
                 for (int i = 1; i <= cols; i++){
                     switch (dtn[i].toUpperCase()){
+                        // PG string-ish types that otherwise fall to the default
+                        // case and get emitted UNQUOTED (breaking the INSERT):
+                        // jsonb/json carry embedded quotes, bpchar is PG's char(n),
+                        // uuid is a quoted literal. Quote them like varchar.
+                        case "JSON":
+                        case "JSONB":
+                        case "BPCHAR":
+                        case "UUID":
                         case "VARCHAR":
                         case "NVARCHAR":
                             nc = rs.getString(i);