Making noise on a wire
To simulate the crosstalk of 2 adjacent tracks, use AWG30 twisted pair with 1MHz signals and low f CMOS on others. 

Terminating your 1MHz with capacitance increases HF current and reduces voltage rise time while using a 50~100 Ohm load reduces current but maintains dV/dt rise time 

Crosstalk Noise may occur by 1/x gap that controls capacitance coupling of dV/dt or high current dI/dt via line inductance, (ESL).

If you want to inject noise on 1MHz then use a relay coil current in a loop so it faces close to 1MHz current loop  If you want voltage noise then bring parallel wires closer together (eg twisted pair.) Then drive a relay coil (with diode) with say a 10 Hz sig gen + transistor.  This could damage CMOS from overvoltage after logic errors by 1/x [mm] separation. Other common noise sources are a brushed drill motor current wire loop near the signal's wire loop.

If you want to see 1MHz clock noise with 10ns rise time causing crosstalk then use twisted pair with another noise signal to measure the dV/dt crosstalk.  But scope probe ground must be very short for signals &lt;= 10ns rise time.

For ESD test purposes read this

anecdote

In my 1st job, I had a 1 day task to fix someone else's design of a system with a 20 PCB card cage with a wirewrap backplane. It was all AWG30 solid wirewrap in neat busses of Aircraft style wire bundles with TTL slew rates.  The look of grief when I told her it had to be redone, random point-to-point made me think this was worse than what she faced crossing the Berlin wall to come to Canada.  Noise crosstalk was unbearable but surmountable to save the life of the project.