From 24837ad948bd00e9fede4d2a1b5677b8dba68c1a Mon Sep 17 00:00:00 2001
From: Trask Stalnaker <trask.stalnaker@gmail.com>
Date: Thu, 16 Apr 2026 17:42:33 -0700
Subject: [PATCH] Add `@Nullable` to equalTo value arg

---
 .../sdk/testing/assertj/OpenTelemetryAssertions.java       | 2 +-
 .../opentelemetry/sdk/testing/assertj/AssertUtilTest.java  | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/OpenTelemetryAssertions.java b/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/OpenTelemetryAssertions.java
index 5b50381a352..c5e5f871753 100644
--- a/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/OpenTelemetryAssertions.java
+++ b/sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/OpenTelemetryAssertions.java
@@ -240,7 +240,7 @@ public static AttributeAssertion satisfies(
    * Returns an {@link AttributeAssertion} that asserts the given {@code key} is present with the
    * given {@code value}.
    */
-  public static <T> AttributeAssertion equalTo(AttributeKey<T> key, T value) {
+  public static <T> AttributeAssertion equalTo(AttributeKey<T> key, @Nullable T value) {
     return AttributeAssertion.create(key, val -> val.isEqualTo(value));
   }
 
diff --git a/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/AssertUtilTest.java b/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/AssertUtilTest.java
index afd5941c572..3a29fff3c13 100644
--- a/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/AssertUtilTest.java
+++ b/sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/AssertUtilTest.java
@@ -59,6 +59,13 @@ void assertAttributesShouldNotThrowIfAllAttributesMatch() {
     AssertUtil.assertAttributes(ATTRIBUTES, assertions);
   }
 
+  @Test
+  void assertAttributesShouldNotThrowIfEqualToNullAndAttributeNotSet() {
+    List<AttributeAssertion> assertions = Arrays.asList(equalTo(WARM, null));
+
+    AssertUtil.assertAttributes(Attributes.empty(), assertions);
+  }
+
   @Test
   void assertAttributesExactlyShouldThrowIfNoAttributeMatch() {
     List<AttributeAssertion> assertions = Arrays.asList(equalTo(WARM, false));