#include <bits/stdc++.h>
using namespace std;
const int N = 110;

int main() {
    int T;
    cin >> T;
    while (T--) {
        int res = 0;
        int n, m;
        int a[N][N];
        cin >> n >> m;
        for (int i = 1; i <= n; i++) {
            string s;
            cin >> s;
            for (int j = 1; j <= m; j++) {
                a[i][j] = s[j - 1] - '0';
            }
        }
        // for (int i = 1; i <= n;i++){
        //     for (int j = 1; j <= m;j++){
        //         cout << a[i][j] << " ";
        //     }
        //     cout << endl;
        // }
        for (int i = 1; i + 3 <= n; i++) {
            for (int j = 1; j + 3 <= m; j++) {
                int cnt = 0;
                if (a[i][j] == 0 && a[i + 1][j] == 0 && a[i + 2][j] == 0 && a[i + 3][j] == 0) {
                    cnt++;
                }
                if (a[i + 3][j] == 0 && a[i + 3][j + 1] == 0 && a[i + 3][j + 2] == 0 && a[i + 3][j + 3] == 0) {
                    cnt++;
                }
                if (a[i + 1][j] == 0 && a[i + 1][j + 1] == 1 && a[i + 1][j + 2] == 1 && a[i + 1][j + 3] == 0) {
                    cnt++;
                }
                if (a[i + 2][j] == 0 && a[i + 2][j + 1] == 1 && a[i + 2][j + 2] == 1 && a[i + 2][j + 3] == 0) {
                    cnt++;
                }
                if (cnt == 4) {
                    res++;
                }
            }
        }
        if (res == 0)
            cout << "No" << endl;
        else
            cout << "Yes" << endl;
    }
    return 0;
}