#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
typedef long long ll;
ll qpow(ll  x, ll  b,ll mod = 1e9 + 7)
{
    ll ans = 1,k = x;
    while (b != 0)
    {
        if (b & 1)ans = ans * k;
        ans %= mod;
        k = k * k;
        b = b / 2;
    }
    return ans;
}
int main()
{
    int t;
    cin >> t;
    while (t--) {
        int r, c;
        cin >> r >> c;
        vector<vector<int>>m(r + 1);
        vector<int>vis(c + 1, 0);
        int now = 0;

        for (int i = 1; i <= r; i++) {
            for (int j = 1; j <= c; j++) {
                char temp;
                cin >> temp;
                if (temp == '1') {
                    m[i].push_back(j);
                }
            }
        }
        int bad = 0;
        for (int i = 1; i <= r; i++) {
            int org=0,t=0;
            for (auto v : m[i]) {
                if (vis[v] != 0&&org==0) {
                    org = vis[v];
                }
                else if (vis[c - v + 1] != org&&org!=0) {
                    bad = 1;
                }
            }
            for (auto v : m[i]) {
                if (vis[c - v + 1] != 0&&t==0) {
                    t = vis[c - v + 1];
                }
                else if (vis[c - v + 1] != t&&t!=0) {
                    bad = 1;
                }
            }
            if (org != 0 && t != 0)bad = 1;
            if (bad == 1)break;
            if (org == 0&&t==0) {
                now++;
                for (auto v : m[i]) {
                    vis[v] = now;
                }
            }
            else if(t==0){
                for (auto v : m[i]) {
                    vis[c - v + 1] = org;
                }
            }
            else {
                for (auto v : m[i]) {
                    vis[v] = t;
                }
            }
        }
        if (bad == 1) {
            cout << 0 << "\n";
        }
        else {
            cout<<qpow(2,now)<<"\n";
        }
    }
    return 0;
}