diff --git a/tests/ahci-test.c b/tests/ahci-test.c
index 999121bb7c..cb84edc8fb 100644
--- a/tests/ahci-test.c
+++ b/tests/ahci-test.c
@@ -155,7 +155,7 @@ static AHCIQState *ahci_vboot(const char *cli, va_list ap)
 {
     AHCIQState *s;
 
-    s = g_malloc0(sizeof(AHCIQState));
+    s = g_new0(AHCIQState, 1);
     s->parent = qtest_pc_vboot(cli, ap);
     alloc_set_flags(s->parent->alloc, ALLOC_LEAK_ASSERT);
 
@@ -1806,7 +1806,7 @@ static void create_ahci_io_test(enum IOMode type, enum AddrMode addr,
     char *name;
     AHCIIOTestOptions *opts;
 
-    opts = g_malloc(sizeof(AHCIIOTestOptions));
+    opts = g_new(AHCIIOTestOptions, 1);
     opts->length = len;
     opts->address_type = addr;
     opts->io_type = type;
diff --git a/tests/fw_cfg-test.c b/tests/fw_cfg-test.c
index 688342bed5..81f45bdfc8 100644
--- a/tests/fw_cfg-test.c
+++ b/tests/fw_cfg-test.c
@@ -79,8 +79,8 @@ static void test_fw_cfg_numa(void)
 
     g_assert_cmpint(qfw_cfg_get_u64(fw_cfg, FW_CFG_NUMA), ==, nb_nodes);
 
-    cpu_mask = g_malloc0(sizeof(uint64_t) * max_cpus);
-    node_mask = g_malloc0(sizeof(uint64_t) * nb_nodes);
+    cpu_mask = g_new0(uint64_t, max_cpus);
+    node_mask = g_new0(uint64_t, nb_nodes);
 
     qfw_cfg_read_data(fw_cfg, cpu_mask, sizeof(uint64_t) * max_cpus);
     qfw_cfg_read_data(fw_cfg, node_mask, sizeof(uint64_t) * nb_nodes);
diff --git a/tests/libqos/ahci.c b/tests/libqos/ahci.c
index 1ca7f456b5..13c0749582 100644
--- a/tests/libqos/ahci.c
+++ b/tests/libqos/ahci.c
@@ -843,7 +843,7 @@ AHCICommand *ahci_command_create(uint8_t command_name)
     AHCICommand *cmd;
 
     g_assert(props);
-    cmd = g_malloc0(sizeof(AHCICommand));
+    cmd = g_new0(AHCICommand, 1);
     g_assert(!(props->dma && props->pio));
     g_assert(!(props->lba28 && props->lba48));
     g_assert(!(props->read && props->write));
diff --git a/tests/libqos/libqos.c b/tests/libqos/libqos.c
index 6226546c28..991bc1aec2 100644
--- a/tests/libqos/libqos.c
+++ b/tests/libqos/libqos.c
@@ -17,7 +17,7 @@ QOSState *qtest_vboot(QOSOps *ops, const char *cmdline_fmt, va_list ap)
 {
     char *cmdline;
 
-    struct QOSState *qs = g_malloc(sizeof(QOSState));
+    struct QOSState *qs = g_new(QOSState, 1);
 
     cmdline = g_strdup_vprintf(cmdline_fmt, ap);
     qs->qts = qtest_start(cmdline);
diff --git a/tests/libqos/malloc.c b/tests/libqos/malloc.c
index b8eff5f495..ac05874b0a 100644
--- a/tests/libqos/malloc.c
+++ b/tests/libqos/malloc.c
@@ -129,7 +129,7 @@ static MemBlock *mlist_new(uint64_t addr, uint64_t size)
     if (!size) {
         return NULL;
     }
-    block = g_malloc0(sizeof(MemBlock));
+    block = g_new0(MemBlock, 1);
 
     block->addr = addr;
     block->size = size;
@@ -305,8 +305,8 @@ QGuestAllocator *alloc_init(uint64_t start, uint64_t end)
     s->start = start;
     s->end = end;
 
-    s->used = g_malloc(sizeof(MemList));
-    s->free = g_malloc(sizeof(MemList));
+    s->used = g_new(MemList, 1);
+    s->free = g_new(MemList, 1);
     QTAILQ_INIT(s->used);
     QTAILQ_INIT(s->free);
 
diff --git a/tests/libqtest.c b/tests/libqtest.c
index cbd709470b..adf71188b6 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -171,7 +171,7 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
     gchar *command;
     const char *qemu_binary = qtest_qemu_binary();
 
-    s = g_malloc(sizeof(*s));
+    s = g_new(QTestState, 1);
 
     socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
     qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
diff --git a/tests/pc-cpu-test.c b/tests/pc-cpu-test.c
index c4211a4e85..11d3e810ef 100644
--- a/tests/pc-cpu-test.c
+++ b/tests/pc-cpu-test.c
@@ -87,7 +87,7 @@ static void add_pc_test_case(const char *mname)
     if (!g_str_has_prefix(mname, "pc-")) {
         return;
     }
-    data = g_malloc(sizeof(PCTestData));
+    data = g_new(PCTestData, 1);
     data->machine = g_strdup(mname);
     data->cpu_model = "Haswell"; /* 1.3+ theoretically */
     data->sockets = 1;