diff --git a/.github/workflows/run-system-tests.yaml b/.github/workflows/run-system-tests.yaml
index 4b0ad663659..b38faee1cca 100644
--- a/.github/workflows/run-system-tests.yaml
+++ b/.github/workflows/run-system-tests.yaml
@@ -62,7 +62,7 @@ jobs:
     needs:
     - build
     # If you change the following comment, update the pattern in the update_system_test_reference.sh script to match.
-    uses: DataDog/system-tests/.github/workflows/system-tests.yml@main # system tests are pinned on release branches only
+    uses: DataDog/system-tests/.github/workflows/system-tests.yml@alexeyk/fix-v1-trace-id-comparison # system tests are pinned on release branches only
     permissions:
       contents: read
       id-token: write
@@ -70,7 +70,7 @@ jobs:
     with:
       library: java
        # If you change the following comment, update the pattern in the update_system_test_reference.sh script to match.
-      ref: "main" # system tests are pinned on release branches only
+      ref: "alexeyk/fix-v1-trace-id-comparison" # system tests are pinned on release branches only
       binaries_artifact: binaries
       desired_execution_time: 900  # 15 minutes
       scenarios_groups: tracer-release
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fed9f25df92..dfe0bcbfd46 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1475,7 +1475,7 @@ publishing-gate:
 
 configure_system_tests:
   variables:
-    SYSTEM_TESTS_REF: "main" # system tests are pinned on release branches only
+    SYSTEM_TESTS_REF: "alexeyk/fix-v1-trace-id-comparison" # system tests are pinned on release branches only
     SYSTEM_TESTS_SCENARIOS_GROUPS: "simple_onboarding,simple_onboarding_profiling,simple_onboarding_appsec,docker-ssi,lib-injection"
 
 create_key:
diff --git a/communication/src/main/java/datadog/communication/ddagent/DDAgentFeaturesDiscovery.java b/communication/src/main/java/datadog/communication/ddagent/DDAgentFeaturesDiscovery.java
index 16be2e84b98..398435a2589 100644
--- a/communication/src/main/java/datadog/communication/ddagent/DDAgentFeaturesDiscovery.java
+++ b/communication/src/main/java/datadog/communication/ddagent/DDAgentFeaturesDiscovery.java
@@ -4,7 +4,7 @@
 import static datadog.communication.http.OkHttpUtils.msgpackRequestBodyOf;
 import static datadog.communication.http.OkHttpUtils.prepareRequest;
 import static datadog.communication.serialization.msgpack.MsgPackWriter.FIXARRAY;
-import static datadog.trace.api.ProtocolVersion.V0_4;
+import static datadog.trace.api.ProtocolVersion.V1_0;
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.emptySet;
 import static java.util.Collections.singletonList;
@@ -118,7 +118,7 @@ public DDAgentFeaturesDiscovery(
     this.agentBaseUrl = agentUrl;
     this.metricsEnabled = metricsEnabled;
     this.ignoreAgentVersionForStats = ignoreAgentVersionForStats;
-    this.protocolVersion = protocolVersion != null ? protocolVersion : V0_4;
+    this.protocolVersion = protocolVersion != null ? protocolVersion : V1_0;
     this.discoveryTimer = monitoring.newTimer("trace.agent.discovery.time");
     this.discoveryState = new State();
   }
diff --git a/communication/src/test/groovy/datadog/communication/ddagent/DDAgentFeaturesDiscoveryTest.groovy b/communication/src/test/groovy/datadog/communication/ddagent/DDAgentFeaturesDiscoveryTest.groovy
index 8bcda6eb811..6fae9ca5f40 100644
--- a/communication/src/test/groovy/datadog/communication/ddagent/DDAgentFeaturesDiscoveryTest.groovy
+++ b/communication/src/test/groovy/datadog/communication/ddagent/DDAgentFeaturesDiscoveryTest.groovy
@@ -87,7 +87,7 @@ class DDAgentFeaturesDiscoveryTest extends DDSpecification {
     V1_0     | V1_ENDPOINT
   }
 
-  def "null protocol version falls back to v0.4 trace endpoints"() {
+  def "null protocol version falls back to v1.0 trace endpoints"() {
     setup:
     OkHttpClient client = Mock(OkHttpClient)
     DDAgentFeaturesDiscovery features =
@@ -98,9 +98,10 @@ class DDAgentFeaturesDiscoveryTest extends DDSpecification {
 
     then:
     1 * client.newCall({ Request request -> request.url().toString() == "http://localhost:8125/info" }) >> { Request request -> infoResponse(request, "{}") }
+    1 * client.newCall({ Request request -> request.url().toString() == "http://localhost:8125/v1.0/traces" }) >> { Request request -> success(request) }
     0 * client.newCall({ Request request -> request.url().toString() == "http://localhost:8125/v0.5/traces" }) >> { Request request -> success(request) }
-    1 * client.newCall({ Request request -> request.url().toString() == "http://localhost:8125/v0.4/traces" }) >> { Request request -> success(request) }
-    features.getTraceEndpoint() == V04_ENDPOINT
+    0 * client.newCall({ Request request -> request.url().toString() == "http://localhost:8125/v0.4/traces" }) >> { Request request -> success(request) }
+    features.getTraceEndpoint() == V1_ENDPOINT
     0 * _
   }
 
diff --git a/dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java b/dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java
index 991c6fd6937..0e88b3cbf43 100644
--- a/dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java
+++ b/dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java
@@ -92,7 +92,7 @@ public final class ConfigDefaults {
       Arrays.asList("user.id", "session.id", "account.id");
   static final boolean DEFAULT_JMX_FETCH_ENABLED = true;
 
-  static final String DEFAULT_TRACE_AGENT_PROTOCOL_VERSION = ProtocolVersion.V0_4.asConfigValue();
+  static final String DEFAULT_TRACE_AGENT_PROTOCOL_VERSION = ProtocolVersion.V1_0.asConfigValue();
 
   static final boolean DEFAULT_CLIENT_IP_ENABLED = false;