diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index 8a19d5a937..9a0f8f9bd3 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -27,9 +27,9 @@ jobs:
         env:
           - { COMPILER: "gcc",   COMPILER_VERSION: "11", LINKER: "bfd",  CRYPTOLIB: "gcrypt"  }
           - { COMPILER: "gcc",   COMPILER_VERSION: "12", LINKER: "gold", CRYPTOLIB: "openssl" }
-          - { COMPILER: "clang", COMPILER_VERSION: "12", LINKER: "gold", CRYPTOLIB: "gcrypt"  }
-          - { COMPILER: "clang", COMPILER_VERSION: "13", LINKER: "lld",  CRYPTOLIB: "openssl" }
-          - { COMPILER: "clang", COMPILER_VERSION: "14", LINKER: "bfd",  CRYPTOLIB: "auto"    }
+          - { COMPILER: "clang", COMPILER_VERSION: "13", LINKER: "gold", CRYPTOLIB: "gcrypt"  }
+          - { COMPILER: "clang", COMPILER_VERSION: "14", LINKER: "lld",  CRYPTOLIB: "openssl" }
+          - { COMPILER: "clang", COMPILER_VERSION: "15", LINKER: "bfd",  CRYPTOLIB: "auto"    }
     env: ${{ matrix.env }}
     steps:
       - name: Repository checkout
diff --git a/src/basic/hashmap.c b/src/basic/hashmap.c
index 1fadaad996..ddd329c874 100644
--- a/src/basic/hashmap.c
+++ b/src/basic/hashmap.c
@@ -1190,7 +1190,7 @@ static int resize_buckets(HashmapBase *h, unsigned entries_add) {
                 } while (rehash_next);
         }
 
-        assert(n_rehashed == n_entries(h));
+        assert_se(n_rehashed == n_entries(h));
 
         return 1;
 }
diff --git a/src/coredump/coredump.c b/src/coredump/coredump.c
index 3ec41a32c3..98e7492811 100644
--- a/src/coredump/coredump.c
+++ b/src/coredump/coredump.c
@@ -931,7 +931,6 @@ log:
 }
 
 static int save_context(Context *context, const struct iovec_wrapper *iovw) {
-        unsigned count = 0;
         const char *unit;
         int r;
 
@@ -955,7 +954,6 @@ static int save_context(Context *context, const struct iovec_wrapper *iovw) {
                         p = startswith(iovec->iov_base, meta_field_names[i]);
                         if (p) {
                                 context->meta[i] = p;
-                                count++;
                                 break;
                         }
                 }
diff --git a/src/libsystemd/sd-journal/journal-verify.c b/src/libsystemd/sd-journal/journal-verify.c
index 40aff67ee8..b9f6a161ed 100644
--- a/src/libsystemd/sd-journal/journal-verify.c
+++ b/src/libsystemd/sd-journal/journal-verify.c
@@ -822,7 +822,7 @@ int journal_file_verify(
         uint64_t entry_seqnum = 0, entry_monotonic = 0, entry_realtime = 0;
         sd_id128_t entry_boot_id = {};  /* Unnecessary initialization to appease gcc */
         bool entry_seqnum_set = false, entry_monotonic_set = false, entry_realtime_set = false, found_main_entry_array = false;
-        uint64_t n_weird = 0, n_objects = 0, n_entries = 0, n_data = 0, n_fields = 0, n_data_hash_tables = 0, n_field_hash_tables = 0, n_entry_arrays = 0, n_tags = 0;
+        uint64_t n_objects = 0, n_entries = 0, n_data = 0, n_fields = 0, n_data_hash_tables = 0, n_field_hash_tables = 0, n_entry_arrays = 0, n_tags = 0;
         usec_t last_usec = 0;
         _cleanup_close_ int data_fd = -1, entry_fd = -1, entry_array_fd = -1;
         _cleanup_fclose_ FILE *data_fp = NULL, *entry_fp = NULL, *entry_array_fp = NULL;
@@ -1205,9 +1205,6 @@ int journal_file_verify(
 
                         n_tags++;
                         break;
-
-                default:
-                        n_weird++;
                 }
 
                 if (p == le64toh(f->header->tail_object_offset)) {
diff --git a/src/machine/machine-dbus.c b/src/machine/machine-dbus.c
index 7a07d20e0b..bd203b37dd 100644
--- a/src/machine/machine-dbus.c
+++ b/src/machine/machine-dbus.c
@@ -206,15 +206,13 @@ int bus_machine_method_get_addresses(sd_bus_message *message, void *userdata, sd
 
         case MACHINE_HOST: {
                 _cleanup_free_ struct local_address *addresses = NULL;
-                struct local_address *a;
-                int n, i;
+                int n;
 
                 n = local_addresses(NULL, 0, AF_UNSPEC, &addresses);
                 if (n < 0)
                         return n;
 
-                for (a = addresses, i = 0; i < n; a++, i++) {
-
+                for (int i = 0; i < n; i++) {
                         r = sd_bus_message_open_container(reply, 'r', "iay");
                         if (r < 0)
                                 return r;
diff --git a/src/network/networkd-dhcp-server.c b/src/network/networkd-dhcp-server.c
index 076779dc0e..e36627cd57 100644
--- a/src/network/networkd-dhcp-server.c
+++ b/src/network/networkd-dhcp-server.c
@@ -320,7 +320,7 @@ static int dhcp4_server_set_dns_from_resolve_conf(Link *link) {
         _cleanup_free_ struct in_addr *addresses = NULL;
         _cleanup_fclose_ FILE *f = NULL;
         size_t n_addresses = 0;
-        int n = 0, r;
+        int r;
 
         f = fopen(PRIVATE_UPLINK_RESOLV_CONF, "re");
         if (!f) {
@@ -341,8 +341,6 @@ static int dhcp4_server_set_dns_from_resolve_conf(Link *link) {
                 if (r == 0)
                         break;
 
-                n++;
-
                 l = strstrip(line);
                 if (IN_SET(*l, '#', ';', 0))
                         continue;