diff --git a/fuzzers/tint_ast_fuzzer/fuzzer.cc b/fuzzers/tint_ast_fuzzer/fuzzer.cc
index ca60cf8..b6b238f 100644
--- a/fuzzers/tint_ast_fuzzer/fuzzer.cc
+++ b/fuzzers/tint_ast_fuzzer/fuzzer.cc
@@ -20,6 +20,7 @@
 #include "fuzzers/tint_ast_fuzzer/mutator.h"
 #include "fuzzers/tint_ast_fuzzer/override_cli_params.h"
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/transform_builder.h"
 
 #include "src/reader/wgsl/parser.h"
 #include "src/writer/wgsl/generator.h"
@@ -109,13 +110,12 @@
       continue;
     }
 
-    transform::Manager transform_manager;
-    transform::DataMap transform_inputs;
-    transform_manager.Add<transform::Robustness>();
+    TransformBuilder tb(data, size);
+    tb.AddTransform<tint::transform::Robustness>();
 
     CommonFuzzer fuzzer(InputFormat::kWGSL, target.output_format);
     fuzzer.EnableInspector();
-    fuzzer.SetTransformManager(&transform_manager, &transform_inputs);
+    fuzzer.SetTransformManager(tb.manager(), tb.data_map());
 
     fuzzer.Run(data, size);
     if (fuzzer.HasErrors()) {
diff --git a/fuzzers/tint_regex_fuzzer/fuzzer.cc b/fuzzers/tint_regex_fuzzer/fuzzer.cc
index 1de67c7..0a55750 100644
--- a/fuzzers/tint_regex_fuzzer/fuzzer.cc
+++ b/fuzzers/tint_regex_fuzzer/fuzzer.cc
@@ -21,6 +21,7 @@
 #include "fuzzers/tint_regex_fuzzer/cli.h"
 #include "fuzzers/tint_regex_fuzzer/override_cli_params.h"
 #include "fuzzers/tint_regex_fuzzer/wgsl_mutator.h"
+#include "fuzzers/transform_builder.h"
 #include "src/reader/wgsl/parser.h"
 #include "src/writer/wgsl/generator.h"
 
@@ -137,13 +138,12 @@
       continue;
     }
 
-    transform::Manager transform_manager;
-    transform::DataMap transform_inputs;
-    transform_manager.Add<transform::Robustness>();
+    TransformBuilder tb(data, size);
+    tb.AddTransform<tint::transform::Robustness>();
 
     CommonFuzzer fuzzer(InputFormat::kWGSL, target.output_format);
     fuzzer.EnableInspector();
-    fuzzer.SetTransformManager(&transform_manager, &transform_inputs);
+    fuzzer.SetTransformManager(tb.manager(), tb.data_map());
 
     fuzzer.Run(data, size);
   }
diff --git a/fuzzers/tint_robustness_fuzzer.cc b/fuzzers/tint_robustness_fuzzer.cc
index e0296bb..16eec00 100644
--- a/fuzzers/tint_robustness_fuzzer.cc
+++ b/fuzzers/tint_robustness_fuzzer.cc
@@ -14,16 +14,17 @@
 
 #include "fuzzers/fuzzer_init.h"
 #include "fuzzers/tint_common_fuzzer.h"
+#include "fuzzers/transform_builder.h"
 
 namespace tint {
 namespace fuzzers {
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  tint::transform::Manager transform_manager;
-  transform_manager.Add<tint::transform::Robustness>();
+  TransformBuilder tb(data, size);
+  tb.AddTransform<tint::transform::Robustness>();
 
   tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kWGSL);
-  fuzzer.SetTransformManager(&transform_manager, {});
+  fuzzer.SetTransformManager(tb.manager(), tb.data_map());
   fuzzer.SetDumpInput(GetCliParams().dump_input);
 
   return fuzzer.Run(data, size);