diff --git a/test/s210/catm/config.py b/test/s210/catm/config.py
index c7c1189002a6f89e9b2009007cf97ac492907d34..a493a5871654ff0eaa30541a6962831fc93819ea 100644
--- a/test/s210/catm/config.py
+++ b/test/s210/catm/config.py
@@ -19,6 +19,7 @@ tomoID = split_path[-2]
 prefix = tomoID + ".test1.catm"
 input_folder = "inputs/"
 tomogram = input_folder + tomoID + ".test1.lps25.mrc"
+black_on_white = 1 # The contrast of tomogram, 0 if the particle has white contrast (positive values)
 
 templates = [input_folder + "mono-8Apx-lps30-box30-rot12-core.mrc"]
 contour_level = [0.2]
diff --git a/test/s210/tm/config.py b/test/s210/tm/config.py
index 2fa7604e6d88b8e1b63c47b24de3f4f198e9bb76..046548bfffa782b5acfce7bb87a464e888400898 100644
--- a/test/s210/tm/config.py
+++ b/test/s210/tm/config.py
@@ -19,6 +19,7 @@ tomoID = split_path[-2]
 prefix = tomoID + ".test1"
 input_folder = "inputs/"
 tomogram = input_folder + tomoID + ".test1.lps25.mrc"
+black_on_white = 1 # The contrast of tomogram, 0 if the particle has white contrast (positive values)
 
 templates = [input_folder + "mono-8Apx-lps30-box30-rot12-core.mrc"]
 contour_level = [0.2]