#include<bits/stdc++.h>
using namespace std;
int main()
{
	int t;
	cin>>t;
	while(t--)
	{
		int n,m;
		cin>>n>>m;
		char a[n+5][m+5];
		for(int i=1;i<=n;i++)
		{
			for(int j=1;j<=m;j++)
			{
				cin>>a[i][j];
			}
		}
		if(n<4||m<4)
		{
			cout<<"No"<<endl;
			continue;
		}
		bool flag=0;
		for(int i=1;i<=n-3;i++)
		{
			for(int j=1;j<=m-3;j++)
			{
				if(a[i][j]=='0'&&a[i][j+1]=='0'&&a[i][j+2]=='0'&&a[i][j+3]=='0'&&a[i+3][j]=='0'&&a[i+3][j+1]=='0'&&a[i+3][j+2]=='0'&&a[i+3][j+3]=='0'&&a[i+1][j]=='0'&&a[i+1][j+3]=='0'&&a[i+2][j]=='0'&&a[i+2][j+3]=='0')
				{
					cout<<"Yes"<<endl;
					flag=1;
					break;
				}
			}
			if(flag)
			{
				break;
			}
		}
		if(flag==0)
		{
			cout<<"No"<<endl;
		}
	}
	return 0;
}

还有，刚才看铃铛一眼给1看成了!还有救吗