diff --git a/TESTBENCH/README.md b/TESTBENCH/README.md
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 This directory contains the testbenches for FPGA fabrics that are automatically generated by OpenFPGA or tuned for a specific FPGA fabric.
 Please keep this directory clean and organize as follows:
 - Each testbench should be placed in a separated directory
+- **common**: include commonly used testbench template for post-PnR verification mainly
 - READMD is the only file allowed in the directory, others should be sub-directories.
diff --git a/TESTBENCH/common/README.md b/TESTBENCH/common/README.md
new file mode 100644
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+# Skywater PDK
+This directory contains the commonly used testbench template for FPGA verificatio
+
+* **post\_pnr\_fpga\_cells.v**: The netlist that includes all the standard cells used by the post-PnRed FPGA fabric
+
+* Pre-PnR testbenches
+  - **pre\_pnr\_ccff\_test.v**: The template testbench for post-PnR verification on the configuration chain 
+
+* Post-PnR testbenches
+  - **post\_pnr\_ccff\_test.v**: The template testbench for post-PnR verification on the configuration chain 
+  - **post\_pnr\_scff\_test.v**: The template testbench for post-PnR verification on the scan chain