diff --git a/src/ctlike/ctlike.par b/src/ctlike/ctlike.par
index 8d190b2..35d3c31 100644
--- a/src/ctlike/ctlike.par
+++ b/src/ctlike/ctlike.par
@@ -21,7 +21,7 @@ infile, f, a, "test/data/crab_events.fits.gz",,,"Event list, counts map or obser
 stat,   s, h, "POISSON",,,            "Optimization statistics"
 refit,  b, h,        no,,,            "Do refitting?"
 caldb,  s, a, "test/irf",,,           "Calibration database"
-irf,    s, a, "kb_E_50h_v3",,,        "Instrument response function"
+irf,    s, a, "cta_dummy_irf",,,      "Instrument response function"
 srcmdl, f, a, "test/data/crab.xml",,, "Source model"
 outmdl, f, a, "crab_results.xml",,,   "Source model output file"
 #
diff --git a/src/ctmodel/ctmodel.par b/src/ctmodel/ctmodel.par
index 3388172..fb304c5 100644
--- a/src/ctmodel/ctmodel.par
+++ b/src/ctmodel/ctmodel.par
@@ -21,7 +21,7 @@ infile,   f, a, "NONE",,, "Input counts map or observation definition file"
 outfile,  f, a, "modmap.fits",,, "Output counts map or observation definition file"
 prefix,   s, h, "modmap_",,, "Prefix for counts maps in observation definition file"
 caldb,    s, a, "test/irf",,, "Calibration database"
-irf,      s, a, "kb_E_50h_v3",,, "Instrument response function"
+irf,      s, a, "cta_dummy_irf",,, "Instrument response function"
 srcmdl,   f, a, "test/data/crab.xml",,, "Source model"
 #
 # Instrument parameters
diff --git a/src/ctobssim/ctobssim.par b/src/ctobssim/ctobssim.par
index 9ed7048..0d48198 100644
--- a/src/ctobssim/ctobssim.par
+++ b/src/ctobssim/ctobssim.par
@@ -24,7 +24,7 @@ prefix, s, h, "sim_events_",,,        "Prefix for event lists in observation def
 # Observation parameters
 #=======================
 caldb,  s, a, "test/irf",,,    "Calibration database"
-irf,    s, a, "kb_E_50h_v3",,, "Instrument response function"
+irf,    s, a, "cta_dummy_irf",,, "Instrument response function"
 #
 # Simulation parameters
 #======================