diff --git a/x-pack/plugins/observability_solution/apm/server/routes/environments/get_environments.ts b/x-pack/plugins/observability_solution/apm/server/routes/environments/get_environments.ts
index 90ae73a214f4a..e7c5d46e7de10 100644
--- a/x-pack/plugins/observability_solution/apm/server/routes/environments/get_environments.ts
+++ b/x-pack/plugins/observability_solution/apm/server/routes/environments/get_environments.ts
@@ -55,6 +55,7 @@ export async function getEnvironments({
           terms: {
             field: SERVICE_ENVIRONMENT,
             missing: ENVIRONMENT_NOT_DEFINED.value,
+            order: { _key: 'asc' as const },
             size,
           },
         },
diff --git a/x-pack/plugins/observability_solution/apm/server/routes/suggestions/get_suggestions_with_terms_aggregation.ts b/x-pack/plugins/observability_solution/apm/server/routes/suggestions/get_suggestions_with_terms_aggregation.ts
index 9a2cea0ebf29d..3e646b5e6375b 100644
--- a/x-pack/plugins/observability_solution/apm/server/routes/suggestions/get_suggestions_with_terms_aggregation.ts
+++ b/x-pack/plugins/observability_solution/apm/server/routes/suggestions/get_suggestions_with_terms_aggregation.ts
@@ -52,7 +52,11 @@ export async function getSuggestionsWithTermsAggregation({
       },
       aggs: {
         items: {
-          terms: { field: fieldName, size },
+          terms: {
+            field: fieldName,
+            size,
+            order: { _key: 'asc' as const },
+          },
         },
       },
     },
diff --git a/x-pack/test/apm_api_integration/tests/environment/get_environment.spec.ts b/x-pack/test/apm_api_integration/tests/environment/get_environment.spec.ts
index e67c601e7713c..cba6a1e8b6b3b 100644
--- a/x-pack/test/apm_api_integration/tests/environment/get_environment.spec.ts
+++ b/x-pack/test/apm_api_integration/tests/environment/get_environment.spec.ts
@@ -42,10 +42,10 @@ export default function environmentsAPITests({ getService }: FtrProviderContext)
           expect(body.environments.length).to.be.equal(4);
           expectSnapshot(body.environments).toMatchInline(`
             Array [
+              "custom-go-environment",
               "development",
               "production",
               "staging",
-              "custom-go-environment",
             ]
           `);
         });