#include<bits/stdc++.h>
using namespace std;
int t, n, m, a[110][110];
bool h(int x, int y) {//这里也可以使用for
	if (a[x][y] == 1 || a[x][y + 1] == 1 || a[x][y + 2] == 1 || a[x][y + 3] == 1) return false;
	if (a[x + 3][y] == 1 || a[x + 3][y + 1] == 1 || a[x + 3][y + 2] == 1 || a[x + 3][y + 3] == 1) return false;
	if (a[x + 1][y] == 1 || a[x + 1][y + 3] == 1 || a[x + 2][y] == 1 || a[x + 2][y + 3] == 1) return false;
	if (a[x + 1][y + 1] == 0 || a[x + 2][y + 1] == 0 || a[x + 1][y + 2] == 0 || a[x + 2][y + 2] == 0) return false;
	return true;
}
int main() {
	cin >> t;
	while (t--) {
		cin >> n >> m;
		for (int i = 1; i <= n; i++) {
			for (int j = 1; j <= m; j++) {
				char c;
				cin >> c;
				a[i][j] = c - '0';
			}
		}
		bool b = true;
		for (int i = 1; i <= n - 4; i++) {
			for (int j = 1; j <= n - 4; j++) {
				if (h(i, j)) {
					cout << "Yes\n";
					b = false;
					break;
				}
			}
			if (!b) {
				break;
			}
		}
		if (b) {
			cout << "No\n";
		}
	}
	return 0;
}