diff --git a/core/src/main/scala-2/caliban/schema/SchemaDerivation.scala b/core/src/main/scala-2/caliban/schema/SchemaDerivation.scala
index 95ef702c7..eabecc03e 100644
--- a/core/src/main/scala-2/caliban/schema/SchemaDerivation.scala
+++ b/core/src/main/scala-2/caliban/schema/SchemaDerivation.scala
@@ -106,7 +106,7 @@ trait CommonSchemaDerivation[R] {
                 Option(
                   p.annotations.collect { case GQLDirective(dir) => dir }.toList ++ {
                     if (enableSemanticNonNull && !isNullable && p.typeclass.canFail)
-                      Some(Directive("semanticNonNull"))
+                      Some(SchemaUtils.SemanticNonNull)
                     else None
                   }
                 ).filter(_.nonEmpty)
diff --git a/core/src/main/scala-3/caliban/schema/DerivationUtils.scala b/core/src/main/scala-3/caliban/schema/DerivationUtils.scala
index 487024cd8..040b327b6 100644
--- a/core/src/main/scala-3/caliban/schema/DerivationUtils.scala
+++ b/core/src/main/scala-3/caliban/schema/DerivationUtils.scala
@@ -143,7 +143,7 @@ private object DerivationUtils {
         deprecatedReason,
         Option(
           getDirectives(fieldAnnotations) ++ {
-            if (enableSemanticNonNull && !isNullable && schema.canFail) Some(Directive("semanticNonNull"))
+            if (enableSemanticNonNull && !isNullable && schema.canFail) Some(SchemaUtils.SemanticNonNull)
             else None
           }
         ).filter(_.nonEmpty)
diff --git a/core/src/main/scala/caliban/schema/SchemaUtils.scala b/core/src/main/scala/caliban/schema/SchemaUtils.scala
index de0e571aa..4db3a4ca0 100644
--- a/core/src/main/scala/caliban/schema/SchemaUtils.scala
+++ b/core/src/main/scala/caliban/schema/SchemaUtils.scala
@@ -4,8 +4,14 @@ import caliban.ResponseValue.ObjectValue
 import caliban.Value.{ EnumValue, NullValue, StringValue }
 import caliban.introspection.adt.{ __DeprecatedArgs, __Field, __Type }
 import caliban.schema.Step.MetadataFunctionStep
+import caliban.parsing.adt.Directive
 
 private[schema] object SchemaUtils {
+  /**
+   * Directive used to mark a field as semantically non-nullable.
+   */
+  val SemanticNonNull = Directive("semanticNonNull")
+
   private val fakeField =
     Some(
       List(
diff --git a/core/src/test/scala/caliban/schema/SemanticNonNullSchemaSpec.scala b/core/src/test/scala/caliban/schema/SemanticNonNullSchemaSpec.scala
index 3e89533f8..f65237c43 100644
--- a/core/src/test/scala/caliban/schema/SemanticNonNullSchemaSpec.scala
+++ b/core/src/test/scala/caliban/schema/SemanticNonNullSchemaSpec.scala
@@ -21,7 +21,7 @@ object SemanticNonNullSchemaSpec extends ZIOSpecDefault {
             hasField[__Field, Option[List[Directive]]](
               "directives",
               _.directives,
-              isSome(contains((Directive("semanticNonNull"))))
+              isSome(contains(SchemaUtils.SemanticNonNull))
             )
           )
         )
@@ -31,7 +31,7 @@ object SemanticNonNullSchemaSpec extends ZIOSpecDefault {
           isSome(
             hasField[__Field, Option[List[Directive]]](
               "directives",
-              _.directives.map(_.filter(_.name == "semanticNonNull")).filter(_.nonEmpty),
+              _.directives.map(_.filter(_ == SchemaUtils.SemanticNonNull)).filter(_.nonEmpty),
               isNone
             )
           )