diff --git a/gitnexus/test/integration/resolvers/helpers.ts b/gitnexus/test/integration/resolvers/helpers.ts
index e92526b19..2fe9de251 100644
--- a/gitnexus/test/integration/resolvers/helpers.ts
+++ b/gitnexus/test/integration/resolvers/helpers.ts
@@ -9,6 +9,13 @@ import type { PipelineResult } from '../../../src/types/pipeline.js';
 import type { GraphRelationship } from 'gitnexus-shared';
 
 const LEGACY_RESOLVER_PARITY_EXPECTED_FAILURES: Readonly<Record<string, ReadonlySet<string>>> = {
+  c: new Set([
+    // The legacy DAG path does not resolve the main → create_service call
+    // because the function prototype in the .h file and the definition in
+    // the .c file create a dedup ambiguity. The registry-primary path
+    // resolves it via scope-based wildcard import binding.
+    'emits CALLS edges for cross-file function calls',
+  ]),
   csharp: new Set([
     'emits the using-import edge App/Program.cs -> Models/User.cs through the scope-resolution path',
     // Generic type-argument USES edges are emitted by the registry-primary
diff --git a/gitnexus/test/unit/registry-primary-flag.test.ts b/gitnexus/test/unit/registry-primary-flag.test.ts
index 5f688c732..9e8be3455 100644
--- a/gitnexus/test/unit/registry-primary-flag.test.ts
+++ b/gitnexus/test/unit/registry-primary-flag.test.ts
@@ -153,6 +153,7 @@ describe('primaryLanguages', () => {
     process.env['REGISTRY_PRIMARY_CSHARP'] = 'false';
     process.env['REGISTRY_PRIMARY_TYPESCRIPT'] = 'false';
     process.env['REGISTRY_PRIMARY_GO'] = 'false';
+    process.env['REGISTRY_PRIMARY_C'] = 'false';
     process.env['REGISTRY_PRIMARY_JAVA'] = '1';
     const enabled = primaryLanguages();
     expect(enabled.has(SupportedLanguages.Python)).toBe(false);