diff --git a/libdnf5/base/transaction.cpp b/libdnf5/base/transaction.cpp
index e03b016bc..a8cd8eae3 100644
--- a/libdnf5/base/transaction.cpp
+++ b/libdnf5/base/transaction.cpp
@@ -1264,7 +1264,8 @@ bool Transaction::Impl::check_gpg_signatures() {
     // TODO(mblaha): DNSsec key verification
     libdnf5::rpm::RpmSignature rpm_signature(base);
     std::set<std::string> processed_repos{};
-    int num_checks_skipped = 0;
+    unsigned long num_checks_skipped = 0;
+    std::set<std::string> repos_with_skipped_checks;
     for (const auto & trans_pkg : packages) {
         if (transaction_item_action_is_inbound(trans_pkg.get_action())) {
             auto const & pkg = trans_pkg.get_package();
@@ -1277,6 +1278,7 @@ bool Transaction::Impl::check_gpg_signatures() {
             auto check_result = rpm_signature.check_package_signature(pkg);
             if (check_result == libdnf5::rpm::RpmSignature::CheckResult::SKIPPED) {
                 num_checks_skipped += 1;
+                repos_with_skipped_checks.insert(pkg.get_repo_id());
             } else if (check_result != libdnf5::rpm::RpmSignature::CheckResult::OK) {
                 // these two errors are possibly recoverable by importing the correct public key
                 auto is_error_recoverable =
@@ -1315,7 +1317,17 @@ bool Transaction::Impl::check_gpg_signatures() {
         }
     }
     if (num_checks_skipped > 0) {
-        auto warning_msg = utils::sformat(_("Warning: skipped PGP checks for {} package(s)."), num_checks_skipped);
+        auto repo_string = libdnf5::utils::string::join(
+            repos_with_skipped_checks, C_("It is a joining character for repositories IDs", ", "));
+        auto warning_msg =
+            (num_checks_skipped == 1)
+                ? utils::sformat(_("Warning: skipped PGP checks for 1 package from {} repository."), repo_string)
+                : utils::sformat(
+                      P_("Warning: skipped PGP checks for {0} packages from {1} repository.",
+                         "Warning: skipped PGP checks for {0} packages from {1} repositories.",
+                         repos_with_skipped_checks.size()),
+                      num_checks_skipped,
+                      repo_string);
         signature_problems.push_back(warning_msg);
     }
     return result;
diff --git a/test/libdnf5/base/test_transaction.cpp b/test/libdnf5/base/test_transaction.cpp
index 5e99b9c6f..a981a64f0 100644
--- a/test/libdnf5/base/test_transaction.cpp
+++ b/test/libdnf5/base/test_transaction.cpp
@@ -38,7 +38,8 @@ void BaseTransactionTest::test_check_gpg_signatures_no_gpgcheck() {
     CPPUNIT_ASSERT(transaction.check_gpg_signatures());
     CPPUNIT_ASSERT_EQUAL((size_t)1, transaction.get_gpg_signature_problems().size());
     CPPUNIT_ASSERT_EQUAL(
-        std::string("Warning: skipped PGP checks for 1 package(s)."), transaction.get_gpg_signature_problems()[0]);
+        std::string("Warning: skipped PGP checks for 1 package from repomd-repo1 repository."),
+        transaction.get_gpg_signature_problems()[0]);
 }
 
 void BaseTransactionTest::test_check_gpg_signatures_fail() {
diff --git a/test/python3/libdnf5/base/test_transaction.py b/test/python3/libdnf5/base/test_transaction.py
index ca09ad741..ee3ff55c2 100644
--- a/test/python3/libdnf5/base/test_transaction.py
+++ b/test/python3/libdnf5/base/test_transaction.py
@@ -32,7 +32,7 @@ def test_check_gpg_signatures_no_gpgcheck(self):
 
         self.assertEqual(1, transaction.get_transaction_packages_count())
         self.assertTrue(transaction.check_gpg_signatures())
-        self.assertEqual(('Warning: skipped PGP checks for 1 package(s).',),
+        self.assertEqual(('Warning: skipped PGP checks for 1 package from repomd-repo1 repository.',),
                          transaction.get_gpg_signature_problems())
 
     def test_check_gpg_signatures_fail(self):