diff --git a/jbmc/src/java_bytecode/java_bytecode_convert_class.cpp b/jbmc/src/java_bytecode/java_bytecode_convert_class.cpp
index cdda7322e35..ff32cdb1c20 100644
--- a/jbmc/src/java_bytecode/java_bytecode_convert_class.cpp
+++ b/jbmc/src/java_bytecode/java_bytecode_convert_class.cpp
@@ -302,10 +302,10 @@ void java_bytecode_convert_classt::convert(
     }
     catch(const unsupported_java_class_signature_exceptiont &e)
     {
-      warning() << "Class: " << c.name
-                << "\n could not parse signature: " << c.signature.value()
-                << "\n " << e.what() << "\n ignoring that the class is generic"
-                << eom;
+      debug() << "Class: " << c.name
+              << "\n could not parse signature: " << c.signature.value()
+              << "\n " << e.what() << "\n ignoring that the class is generic"
+              << eom;
     }
   }
 
@@ -364,10 +364,10 @@ void java_bytecode_convert_classt::convert(
       }
       catch(const unsupported_java_class_signature_exceptiont &e)
       {
-        warning() << "Superclass: " << c.super_class << " of class: " << c.name
-                  << "\n could not parse signature: " << superclass_ref.value()
-                  << "\n " << e.what()
-                  << "\n ignoring that the superclass is generic" << eom;
+        debug() << "Superclass: " << c.super_class << " of class: " << c.name
+                << "\n could not parse signature: " << superclass_ref.value()
+                << "\n " << e.what()
+                << "\n ignoring that the superclass is generic" << eom;
         class_type.add_base(base);
       }
     }
@@ -404,10 +404,10 @@ void java_bytecode_convert_classt::convert(
       }
       catch(const unsupported_java_class_signature_exceptiont &e)
       {
-        warning() << "Interface: " << interface << " of class: " << c.name
-                  << "\n could not parse signature: " << interface_ref.value()
-                  << "\n " << e.what()
-                  << "\n ignoring that the interface is generic" << eom;
+        debug() << "Interface: " << interface << " of class: " << c.name
+                << "\n could not parse signature: " << interface_ref.value()
+                << "\n " << e.what()
+                << "\n ignoring that the interface is generic" << eom;
         class_type.add_base(base);
       }
     }
diff --git a/jbmc/src/java_bytecode/java_bytecode_convert_method.cpp b/jbmc/src/java_bytecode/java_bytecode_convert_method.cpp
index 6db54c48305..fd22667eb84 100644
--- a/jbmc/src/java_bytecode/java_bytecode_convert_method.cpp
+++ b/jbmc/src/java_bytecode/java_bytecode_convert_method.cpp
@@ -275,21 +275,21 @@ java_method_typet member_type_lazy(
       }
       else
       {
-        message.warning() << "Method: " << class_name << "." << method_name
-                          << "\n signature: " << signature.value()
-                          << "\n descriptor: " << descriptor
-                          << "\n different number of parameters, reverting to "
-                             "descriptor"
-                          << message.eom;
+        message.debug() << "Method: " << class_name << "." << method_name
+                        << "\n signature: " << signature.value()
+                        << "\n descriptor: " << descriptor
+                        << "\n different number of parameters, reverting to "
+                           "descriptor"
+                        << message.eom;
       }
     }
     catch(const unsupported_java_class_signature_exceptiont &e)
     {
-      message.warning() << "Method: " << class_name << "." << method_name
-                        << "\n could not parse signature: " << signature.value()
-                        << "\n " << e.what() << "\n"
-                        << " reverting to descriptor: " << descriptor
-                        << message.eom;
+      message.debug() << "Method: " << class_name << "." << method_name
+                      << "\n could not parse signature: " << signature.value()
+                      << "\n " << e.what() << "\n"
+                      << " reverting to descriptor: " << descriptor
+                      << message.eom;
     }
   }
   return to_java_method_type(*member_type_from_descriptor);
diff --git a/jbmc/src/java_bytecode/java_class_loader.cpp b/jbmc/src/java_bytecode/java_class_loader.cpp
index 75eadf057ad..7752661237e 100644
--- a/jbmc/src/java_bytecode/java_class_loader.cpp
+++ b/jbmc/src/java_bytecode/java_class_loader.cpp
@@ -164,11 +164,10 @@ java_class_loadert::get_parse_tree(
         ++parse_tree_it;
         break;
       }
-      warning()
-        << "Skipping class " << class_name
-        << " marked with OverlayClassImplementation but found before"
-          " original definition"
-        << eom;
+      debug() << "Skipping class " << class_name
+              << " marked with OverlayClassImplementation but found before"
+                 " original definition"
+              << eom;
     }
     auto unloaded_or_overlay_out_of_order_it = parse_tree_it;
     ++parse_tree_it;
@@ -180,9 +179,8 @@ java_class_loadert::get_parse_tree(
     // Remove non-initial classes that aren't overlays
     if(!is_overlay_class(parse_tree_it->parsed_class))
     {
-      warning()
-        << "Skipping duplicate definition of class " << class_name
-        << " not marked with OverlayClassImplementation" << eom;
+      debug() << "Skipping duplicate definition of class " << class_name
+              << " not marked with OverlayClassImplementation" << eom;
       auto duplicate_non_overlay_it = parse_tree_it;
       ++parse_tree_it;
       parse_trees.erase(duplicate_non_overlay_it);
@@ -194,7 +192,7 @@ java_class_loadert::get_parse_tree(
     return parse_trees;
 
   // Not found or failed to load
-  warning() << "failed to load class " << class_name << eom;
+  debug() << "failed to load class " << class_name << eom;
   parse_trees.emplace_back(class_name);
   return parse_trees;
 }