diff --git a/tests/integration/targets/gcp_compute_node_group/aliases b/tests/integration/targets/gcp_compute_node_group/aliases
index 9812f01..5ce6d4c 100644
--- a/tests/integration/targets/gcp_compute_node_group/aliases
+++ b/tests/integration/targets/gcp_compute_node_group/aliases
@@ -1,2 +1,5 @@
 cloud/gcp
+# this test cannot run in CI, as the minimum
+# node group size is beyond the compute quota
+# limit of a default project.
 unsupported
diff --git a/tests/integration/targets/gcp_compute_region_target_https_proxy/aliases b/tests/integration/targets/gcp_compute_region_target_https_proxy/aliases
index 9812f01..d129945 100644
--- a/tests/integration/targets/gcp_compute_region_target_https_proxy/aliases
+++ b/tests/integration/targets/gcp_compute_region_target_https_proxy/aliases
@@ -1,2 +1,4 @@
 cloud/gcp
+# unsupported as testing this resource requires
+# a missing resource (compute_regional_ssl_cert)
 unsupported
diff --git a/tests/integration/targets/gcp_resourcemanager_project/aliases b/tests/integration/targets/gcp_resourcemanager_project/aliases
index ff7eb2d..72efdb9 100644
--- a/tests/integration/targets/gcp_resourcemanager_project/aliases
+++ b/tests/integration/targets/gcp_resourcemanager_project/aliases
@@ -1,2 +1,4 @@
 cloud/gcp
+# unsupported as CI test project does not support
+# creating folders / projects to test.
 unsupported
\ No newline at end of file
diff --git a/tests/integration/targets/gcp_sql_ssl_cert/aliases b/tests/integration/targets/gcp_sql_ssl_cert/aliases
index 9812f01..8189da3 100644
--- a/tests/integration/targets/gcp_sql_ssl_cert/aliases
+++ b/tests/integration/targets/gcp_sql_ssl_cert/aliases
@@ -1,2 +1,4 @@
 cloud/gcp
+# unsupported as gcp_sql_ssl_cert_info resource
+# does not exist.
 unsupported