diff --git a/.gitlab/collect_results.sh b/.gitlab/collect_results.sh
index 1d5027bc811..5991a125902 100755
--- a/.gitlab/collect_results.sh
+++ b/.gitlab/collect_results.sh
@@ -12,7 +12,13 @@ WORKSPACE_DIR=workspace
 mkdir -p $TEST_RESULTS_DIR
 mkdir -p $WORKSPACE_DIR
 
-mapfile -t TEST_RESULT_DIRS < <(find $WORKSPACE_DIR -name test-results -type d)
+# Main project modules redirect their build directory to workspace/<project-path>/build/ in CI
+# (see build.gradle.kts layout.buildDirectory override). buildSrc is a separate Gradle build
+# that runs before the main build is configured, so this redirect never applies to it;
+# its test results always land in buildSrc/**/build/test-results/, not under workspace/.
+SEARCH_DIRS=($WORKSPACE_DIR buildSrc)
+
+mapfile -t TEST_RESULT_DIRS < <(find "${SEARCH_DIRS[@]}" -name test-results -type d)
 
 if [[ ${#TEST_RESULT_DIRS[@]} -eq 0 ]]; then
   echo "No test results found"
diff --git a/buildSrc/src/test/kotlin/datadog/gradle/plugin/GradleFixture.kt b/buildSrc/src/test/kotlin/datadog/gradle/plugin/GradleFixture.kt
index 3bb1f85f2d5..9401f399170 100644
--- a/buildSrc/src/test/kotlin/datadog/gradle/plugin/GradleFixture.kt
+++ b/buildSrc/src/test/kotlin/datadog/gradle/plugin/GradleFixture.kt
@@ -23,7 +23,12 @@ internal open class GradleFixture(protected val projectDir: File) {
    */
   fun run(vararg args: String, expectFailure: Boolean = false, env: Map<String, String> = emptyMap()): BuildResult {
     val runner = GradleRunner.create()
-      .withTestKitDir(File(projectDir, ".gradle-test-kit"))
+      // Use a testkit dir scoped to this fixture's projectDir. The Tooling API always uses a
+      // daemon and ignores org.gradle.daemon=false. By giving each test its own testkit dir,
+      // we force a fresh daemon per test — ensuring withEnvironment() vars (e.g.
+      // MAVEN_REPOSITORY_PROXY) are correctly set on the daemon JVM and not inherited from
+      // a previously-started daemon with a different test's environment.
+      .withTestKitDir(file(".testkit"))
       .withPluginClasspath()
       .withProjectDir(projectDir)
       .withEnvironment(System.getenv() + env)