diff --git a/unittest/formats/test_atom_styles.cpp b/unittest/formats/test_atom_styles.cpp
index 429d25f89f..f34a21ef85 100644
--- a/unittest/formats/test_atom_styles.cpp
+++ b/unittest/formats/test_atom_styles.cpp
@@ -192,16 +192,11 @@ TEST_F(AtomStyleTest, atomic)
     ASSERT_EQ(lmp->atom->map_user, 0);
     ASSERT_EQ(lmp->atom->map_tag_max, -1);
 
-#if 0
-    //    ASSERT_NE(lmp->atom->,nullptr);
-    //    ASSERT_EQ(lmp->atom->firstgroup, -1);
-    //    ASSERT_EQ(lmp->atom->firstgroupname, nullptr);
-#endif
-
     if (!verbose) ::testing::internal::CaptureStdout();
     lmp->input->one("atom_style charge");
     lmp->input->one("atom_style atomic");
     if (!verbose) ::testing::internal::GetCapturedStdout();
+
     ASSERT_THAT(std::string(lmp->atom->atom_style), Eq("atomic"));
     ASSERT_NE(lmp->atom->avec, nullptr);
     ASSERT_EQ(lmp->atom->natoms, 0);
@@ -343,6 +338,152 @@ TEST_F(AtomStyleTest, atomic)
     ASSERT_EQ(lmp->atom->map_tag_max, -1);
 }
 
+TEST_F(AtomStyleTest, charge)
+{
+    if (!verbose) ::testing::internal::CaptureStdout();
+    lmp->input->one("atom_style charge");
+    if (!verbose) ::testing::internal::GetCapturedStdout();
+    ASSERT_THAT(std::string(lmp->atom->atom_style), Eq("charge"));
+    ASSERT_NE(lmp->atom->avec, nullptr);
+    ASSERT_EQ(lmp->atom->natoms, 0);
+    ASSERT_EQ(lmp->atom->nlocal, 0);
+    ASSERT_EQ(lmp->atom->nghost, 0);
+    ASSERT_EQ(lmp->atom->nmax, 1);
+    ASSERT_EQ(lmp->atom->tag_enable, 1);
+    ASSERT_EQ(lmp->atom->molecular, 0);
+    ASSERT_EQ(lmp->atom->nellipsoids, 0);
+    ASSERT_EQ(lmp->atom->nlines, 0);
+    ASSERT_EQ(lmp->atom->ntris, 0);
+    ASSERT_EQ(lmp->atom->nbodies, 0);
+    ASSERT_EQ(lmp->atom->nbonds, 0);
+    ASSERT_EQ(lmp->atom->nangles, 0);
+    ASSERT_EQ(lmp->atom->ndihedrals, 0);
+    ASSERT_EQ(lmp->atom->nimpropers, 0);
+    ASSERT_EQ(lmp->atom->ntypes, 0);
+    ASSERT_EQ(lmp->atom->nbondtypes, 0);
+    ASSERT_EQ(lmp->atom->nangletypes, 0);
+    ASSERT_EQ(lmp->atom->ndihedraltypes, 0);
+    ASSERT_EQ(lmp->atom->nimpropertypes, 0);
+    ASSERT_EQ(lmp->atom->bond_per_atom, 0);
+    ASSERT_EQ(lmp->atom->angle_per_atom, 0);
+    ASSERT_EQ(lmp->atom->dihedral_per_atom, 0);
+    ASSERT_EQ(lmp->atom->improper_per_atom, 0);
+    ASSERT_EQ(lmp->atom->extra_bond_per_atom, 0);
+    ASSERT_EQ(lmp->atom->extra_angle_per_atom, 0);
+    ASSERT_EQ(lmp->atom->extra_dihedral_per_atom, 0);
+    ASSERT_EQ(lmp->atom->extra_improper_per_atom, 0);
+
+    ASSERT_NE(lmp->atom->tag, nullptr);
+    ASSERT_NE(lmp->atom->type, nullptr);
+    ASSERT_NE(lmp->atom->mask, nullptr);
+    ASSERT_NE(lmp->atom->image, nullptr);
+    ASSERT_NE(lmp->atom->x, nullptr);
+    ASSERT_NE(lmp->atom->v, nullptr);
+    ASSERT_NE(lmp->atom->f, nullptr);
+    ASSERT_NE(lmp->atom->q, nullptr);
+    ASSERT_EQ(lmp->atom->mu, nullptr);
+    ASSERT_EQ(lmp->atom->omega, nullptr);
+    ASSERT_EQ(lmp->atom->angmom, nullptr);
+    ASSERT_EQ(lmp->atom->torque, nullptr);
+    ASSERT_EQ(lmp->atom->radius, nullptr);
+    ASSERT_EQ(lmp->atom->rmass, nullptr);
+    ASSERT_EQ(lmp->atom->ellipsoid, nullptr);
+    ASSERT_EQ(lmp->atom->line, nullptr);
+    ASSERT_EQ(lmp->atom->tri, nullptr);
+    ASSERT_EQ(lmp->atom->body, nullptr);
+    ASSERT_EQ(lmp->atom->molecule, nullptr);
+    ASSERT_EQ(lmp->atom->molindex, nullptr);
+    ASSERT_EQ(lmp->atom->molatom, nullptr);
+    ASSERT_EQ(lmp->atom->num_bond, nullptr);
+    ASSERT_EQ(lmp->atom->bond_type, nullptr);
+    ASSERT_EQ(lmp->atom->bond_atom, nullptr);
+    ASSERT_EQ(lmp->atom->num_angle, nullptr);
+    ASSERT_EQ(lmp->atom->angle_type, nullptr);
+    ASSERT_EQ(lmp->atom->angle_atom1, nullptr);
+    ASSERT_EQ(lmp->atom->angle_atom2, nullptr);
+    ASSERT_EQ(lmp->atom->angle_atom3, nullptr);
+    ASSERT_EQ(lmp->atom->num_dihedral, nullptr);
+    ASSERT_EQ(lmp->atom->dihedral_type, nullptr);
+    ASSERT_EQ(lmp->atom->dihedral_atom1, nullptr);
+    ASSERT_EQ(lmp->atom->dihedral_atom2, nullptr);
+    ASSERT_EQ(lmp->atom->dihedral_atom3, nullptr);
+    ASSERT_EQ(lmp->atom->dihedral_atom4, nullptr);
+    ASSERT_EQ(lmp->atom->num_improper, nullptr);
+    ASSERT_EQ(lmp->atom->improper_type, nullptr);
+    ASSERT_EQ(lmp->atom->improper_atom1, nullptr);
+    ASSERT_EQ(lmp->atom->improper_atom2, nullptr);
+    ASSERT_EQ(lmp->atom->improper_atom3, nullptr);
+    ASSERT_EQ(lmp->atom->improper_atom4, nullptr);
+    ASSERT_EQ(lmp->atom->maxspecial, 1);
+    ASSERT_EQ(lmp->atom->nspecial, nullptr);
+    ASSERT_EQ(lmp->atom->special, nullptr);
+    ASSERT_EQ(lmp->atom->vfrac, nullptr);
+    ASSERT_EQ(lmp->atom->s0, nullptr);
+    ASSERT_EQ(lmp->atom->x0, nullptr);
+    ASSERT_EQ(lmp->atom->sp, nullptr);
+    ASSERT_EQ(lmp->atom->fm, nullptr);
+    ASSERT_EQ(lmp->atom->fm_long, nullptr);
+    ASSERT_EQ(lmp->atom->spin, nullptr);
+    ASSERT_EQ(lmp->atom->eradius, nullptr);
+    ASSERT_EQ(lmp->atom->ervel, nullptr);
+    ASSERT_EQ(lmp->atom->erforce, nullptr);
+    ASSERT_EQ(lmp->atom->ervelforce, nullptr);
+    ASSERT_EQ(lmp->atom->cs, nullptr);
+    ASSERT_EQ(lmp->atom->csforce, nullptr);
+    ASSERT_EQ(lmp->atom->vforce, nullptr);
+    ASSERT_EQ(lmp->atom->etag, nullptr);
+    ASSERT_EQ(lmp->atom->uCond, nullptr);
+    ASSERT_EQ(lmp->atom->uMech, nullptr);
+    ASSERT_EQ(lmp->atom->uChem, nullptr);
+    ASSERT_EQ(lmp->atom->uCG, nullptr);
+    ASSERT_EQ(lmp->atom->uCGnew, nullptr);
+    ASSERT_EQ(lmp->atom->duChem, nullptr);
+    ASSERT_EQ(lmp->atom->dpdTheta, nullptr);
+    ASSERT_EQ(lmp->atom->cc, nullptr);
+    ASSERT_EQ(lmp->atom->cc_flux, nullptr);
+    ASSERT_EQ(lmp->atom->edpd_temp, nullptr);
+    ASSERT_EQ(lmp->atom->edpd_flux, nullptr);
+    ASSERT_EQ(lmp->atom->edpd_cv, nullptr);
+    ASSERT_EQ(lmp->atom->length, nullptr);
+    ASSERT_EQ(lmp->atom->buckling, nullptr);
+    ASSERT_EQ(lmp->atom->bond_nt, nullptr);
+    ASSERT_EQ(lmp->atom->contact_radius, nullptr);
+    ASSERT_EQ(lmp->atom->smd_data_9, nullptr);
+    ASSERT_EQ(lmp->atom->smd_stress, nullptr);
+    ASSERT_EQ(lmp->atom->eff_plastic_strain, nullptr);
+    ASSERT_EQ(lmp->atom->eff_plastic_strain_rate, nullptr);
+    ASSERT_EQ(lmp->atom->damage, nullptr);
+    ASSERT_EQ(lmp->atom->rho, nullptr);
+    ASSERT_EQ(lmp->atom->drho, nullptr);
+    ASSERT_EQ(lmp->atom->esph, nullptr);
+    ASSERT_EQ(lmp->atom->desph, nullptr);
+    ASSERT_EQ(lmp->atom->cv, nullptr);
+    ASSERT_EQ(lmp->atom->vest, nullptr);
+    ASSERT_EQ(lmp->atom->nmolecule, 0);
+    ASSERT_EQ(lmp->atom->molecules, nullptr);
+    ASSERT_EQ(lmp->atom->nivector, 0);
+    ASSERT_EQ(lmp->atom->ndvector, 0);
+    ASSERT_EQ(lmp->atom->iname, nullptr);
+    ASSERT_EQ(lmp->atom->dname, nullptr);
+    ASSERT_EQ(lmp->atom->mass, nullptr);
+    ASSERT_EQ(lmp->atom->mass_setflag, nullptr);
+    ASSERT_EQ(lmp->atom->nextra_grow, 0);
+    ASSERT_EQ(lmp->atom->nextra_restart, 0);
+    ASSERT_EQ(lmp->atom->nextra_border, 0);
+    ASSERT_EQ(lmp->atom->nextra_grow_max, 0);
+    ASSERT_EQ(lmp->atom->nextra_restart_max, 0);
+    ASSERT_EQ(lmp->atom->nextra_border_max, 0);
+    ASSERT_EQ(lmp->atom->nextra_store, 0);
+    ASSERT_EQ(lmp->atom->extra_grow, nullptr);
+    ASSERT_EQ(lmp->atom->extra_restart, nullptr);
+    ASSERT_EQ(lmp->atom->extra_border, nullptr);
+    ASSERT_EQ(lmp->atom->extra, nullptr);
+    ASSERT_EQ(lmp->atom->sametag, nullptr);
+    ASSERT_EQ(lmp->atom->map_style, 0);
+    ASSERT_EQ(lmp->atom->map_user, 0);
+    ASSERT_EQ(lmp->atom->map_tag_max, -1);
+}
+
 } // namespace LAMMPS_NS
 
 int main(int argc, char **argv)