diff --git a/pfunit/GNUmakefile b/pfunit/GNUmakefile
deleted file mode 100644
index a0cb6118802077b9ee9838ee333bbf3cdba5bee9..0000000000000000000000000000000000000000
--- a/pfunit/GNUmakefile
+++ /dev/null
@@ -1,82 +0,0 @@
-# Copyright (c) 2013-2024 MPI-M, Luis Kornblueh, Rahul Sinha and DWD, Florian Prill. All rights reserved.
-#
-# SPDX-License-Identifier: BSD-3-Clause
-#
-
-.PHONY: clean tests all
-
-# Individual stuff (Christian)
-F90=gfortran
-PFUNIT=/informatik/home/zoller/scratch/lib/pfunit-serial
-LIB_DIR=/informatik/home/zoller/scratch/lib
-
-TOP_DIR := $(shell pwd)
-TEST_DIR=$(TOP_DIR)/tests
-SRC_DIR=$(TOP_DIR)/../src
-INCL_DIR=$(TOP_DIR)/../include
-
-VPATH = . $(SRC_DIR) $(TEST_DIR)
-
-# Decide the file extensions.
-include $(PFUNIT)/include/extensions.mk
-
-EXE = tests
-
-PFUNIT_LIBS = -L$(PFUNIT)/lib -lpfunit
-PFUNIT_INCL = -I$(PFUNIT)/mod -I$(PFUNIT)/include
-PFUNIT_DRV = $(PFUNIT)/include/driver.F90
-
-SRC_OBJS = $(SRC_DIR)/*$(OBJ_EXT)
-TEST_INCL = -I$(TEST_DIR)
-TEST_OBJS = $(TEST_DIR)/*$(OBJ_EXT)
-
-FFLAGS += -I$(INCL_DIR) $(PFUNIT_INCL) $(TEST_INCL) $(PFUNIT_LIBS)
-
-all: clean $(EXE) # Kein Plan, weshalb das clean nötig ist
- ./$(EXE)
-
-$(EXE): testSuites.inc from_example_test.pf tests
- $(F90) -o $@ $(PFUNIT_DRV) $(TEST_OBJS) $(SRC_OBJS) $(FFLAGS)
-
-clean:
- make -C $(TEST_DIR) clean
- rm -f $(EXE) *$(OBJ_EXT)
-
-tests:
- make -C $(TEST_DIR) tests
-
-export SRC_DIR
-export F90
-export FFLAGS
-export PFUNIT
-
-#PFUNITROOT =/informatik/home/zoller/scratch/lib/pfunit-serial
-#PFUNIT_INCLUDE = -I$(PFUNITROOT)/mod -I$(PFUNITROOT)/include
-#PFUNIT_LIB = -L$(PFUNIT)/lib -lpfunit
-#
-#VPATH = ../src tests
-#
-#SRC_DIR = ../src
-#
-#INCLUDE = -I../include
-#LIBS = $(PFUNIT_LIB)
-#
-#F90 = gfortran
-#FFLAGS = $(INCLUDE) -Wall
-#
-#%.f90: %.pf
-# $(CHECKROOT)/bin/checkmk $< > $@
-#
-#all: example_test
-# ./example_test
-#
-#example_test: example_test.o
-# $(CC) $(CFLAGS) -o $@ $< $(SRC_DIR)/mtime_*.o $(LIBS)
-#
-#example_test.o: example_test.c
-#
-#example_test.c: example_test.check
-#
-#
-#clean:
-# rm -f example_test *.o *.c
diff --git a/pfunit/README b/pfunit/README
deleted file mode 100644
index 974a88ca8dd2132828763189f78dcd2eeecd8127..0000000000000000000000000000000000000000
--- a/pfunit/README
+++ /dev/null
@@ -1,8 +0,0 @@
-Unit Tests for mtime with pFUnit
-================================
-
-pFUnit: http://pfunit.sourceforge.net/
-
-For installation see http://pfunit.sourceforge.net/page_Installation.html
-
-Works only with gfortran 4.8.1 and above. Only pFUnit version 2.1.0 branch worked for me.
diff --git a/pfunit/tests/GNUmakefile b/pfunit/tests/GNUmakefile
deleted file mode 100644
index fb0f108858e7bcf61c5df92063397411b8f3144d..0000000000000000000000000000000000000000
--- a/pfunit/tests/GNUmakefile
+++ /dev/null
@@ -1,24 +0,0 @@
-# Copyright (c) 2013-2024 MPI-M, Luis Kornblueh, Rahul Sinha and DWD, Florian Prill. All rights reserved.
-#
-# SPDX-License-Identifier: BSD-3-Clause
-#
-
-.PHONY: clean tests
-
-SRCS = $(wildcard *.pf)
-OBJS = $(SRCS:.pf=$(OBJ_EXT))
-
-tests: $(OBJS)
-
-testSuites.inc: $(SRCS)
-
-FFLAGS += -I$(SRC_DIR) -I$(PFUNIT)/mod
-
-%.F90: %.pf
- $(PFUNIT)/bin/pFUnitParser.py $< $@
-
-%$(OBJ_EXT): %.F90
- $(F90) -c $(FFLAGS) $<
-
-clean:
- $(RM) *.o *.mod
diff --git a/pfunit/tests/from_example_test.pf b/pfunit/tests/from_example_test.pf
deleted file mode 100644
index 42c5f25a0e8c4ac99a2f8c311c45488da988bf71..0000000000000000000000000000000000000000
--- a/pfunit/tests/from_example_test.pf
+++ /dev/null
@@ -1,140 +0,0 @@
-!! Copyright (c) 2013-2024 MPI-M, Luis Kornblueh, Rahul Sinha and DWD, Florian Prill. All rights reserved.
-!!
-!! SPDX-License-Identifier: BSD-3-Clause
-!!
-
-MODULE from_example_test
-
-USE pFUnit_mod
-USE mtime
-
-IMPLICIT NONE
-
-CONTAINS
-
-@before
-SUBROUTINE setup()
-
- call setCalendar(year_of_365_days) ! proleptic_gregorian/year_of_365_days/year_of_360_days.
-
-END SUBROUTINE setup
-
-@test()
-SUBROUTINE test_calendar_setup()
-
- character(len=max_calendar_str_len) :: calendar_in_use
-
- call calendarToString(calendar_in_use)
- @assertEqual('Year of 365 days', TRIM(calendar_in_use))
- @assertEqual(2, calendarType())
-
-END SUBROUTINE test_calendar_setup
-
-@test()
-SUBROUTINE test_date_interface()
-
- type(date), pointer :: test_date
- character(len=max_date_str_len) :: test_date_string
-
- test_date => newdate(2020,01,30)
- @assertTrue(associated(test_date))
-
- call dateToString(test_date, test_date_string)
- @assertEqual('2020-01-30', TRIM(test_date_string))
-
- call deallocateDate(test_date)
- @assertFalse(associated(test_date))
-
-END SUBROUTINE test_date_interface
-
-
-
-@test()
-SUBROUTINE test_datetime_and_timeddelta_interface()
-
- type(datetime), pointer :: start_date
- type(datetime), pointer :: start_date_tmp
- type(datetime), pointer :: start_date_test
- type(datetime), pointer :: stop_date
-
- type(timedelta), pointer :: time_step
-
- type(datetime), pointer :: current_date
-
- character(len=max_date_str_len) :: start_date_string
- character(len=max_date_str_len) :: stop_date_string
- character(len=max_date_str_len) :: time_step_string
- character(len=max_date_str_len) :: current_date_string
- character(len=32) :: fmtstr = '%x'
-
- integer :: step_count
-
-
- start_date_tmp => newDatetime('2012-09-01T02:10:00.000')
- start_date => newDatetime(start_date_tmp)
- @assertTrue(associated(start_date))
- call datetimetoString(start_date, start_date_string)
- @assertEqual('2012-09-01T02:10:00.000Z', TRIM(start_date_string))
-
- start_date_tmp => newDatetime(2012,09,01,02,10,0,0)
- start_date => newDatetime(start_date_tmp)
- @assertTrue(associated(start_date))
- call datetimetoString(start_date, start_date_string)
- @assertEqual('2012-09-01T02:10:00.000Z', TRIM(start_date_string))
-
-
- stop_date => newDateTime("2012-09-10T14:00:00.000");
- call datetimeToPosixString(stop_date, stop_date_string, fmtstr)
- @assertEqual('09/10/12', TRIM(stop_date_string))
-
-
- time_step => newTimedelta('PT12H')
- call timedeltaToString(time_step, time_step_string)
- @assertEqual('PT12H', TRIM(time_step_string))
-
-
- ! copy operator - overload newDatetime using construct and copy!
- current_date => newDatetime('2012-09-01T02:10:00.000')
- call datetimeToString(current_date, current_date_string)
- @assertEqual('2012-09-01T02:10:00.000Z', TRIM(current_date_string))
-
- current_date = start_date
- call datetimeToString(current_date, current_date_string)
- @assertEqual('2012-09-01T02:10:00.000Z', TRIM(current_date_string))
-
-
- step_count = 0
- time_integration: do
- current_date = current_date + time_step
- step_count = step_count + 1
- call datetimeToString(current_date, current_date_string)
- @assertTrue(step_count /= 1 .OR. TRIM(current_date_string) == '2012-09-01T14:10:00.000Z')
- @assertTrue(step_count /= 2 .OR. TRIM(current_date_string) == '2012-09-02T02:10:00.000Z')
- @assertTrue(step_count /= 5 .OR. TRIM(current_date_string) == '2012-09-03T14:10:00.000Z')
- @assertTrue(step_count /= 18 .OR. TRIM(current_date_string) == '2012-09-10T02:10:00.000Z')
- if (current_date >= stop_date) exit time_integration
- enddo time_integration
- @assertEqual(19, step_count)
- @assertEqual('2012-09-10T14:10:00.000Z', current_date_string)
-
-
- call deallocateDatetime(start_date)
- call deallocateDatetime(stop_date)
- call deallocateDatetime(current_date)
- call deallocateTimeDelta(time_step)
-
- @assertFalse(associated(start_date))
- @assertFalse(associated(stop_date))
- @assertFalse(associated(current_date))
- @assertFalse(associated(time_step))
-
-END SUBROUTINE test_datetime_and_timeddelta_interface
-
-@after
-SUBROUTINE teardown()
-
- call resetCalendar()
-
-END SUBROUTINE teardown
-
-END MODULE from_example_test
diff --git a/pfunit/tests/testSuites.inc b/pfunit/tests/testSuites.inc
deleted file mode 100644
index 21960199c3a31a8341b233809e39a40fa8bd3e24..0000000000000000000000000000000000000000
--- a/pfunit/tests/testSuites.inc
+++ /dev/null
@@ -1,5 +0,0 @@
-!! Copyright (c) 2013-2024 MPI-M, Luis Kornblueh, Rahul Sinha and DWD, Florian Prill. All rights reserved.
-!!
-!! SPDX-License-Identifier: BSD-3-Clause
-!!
-ADD_TEST_SUITE(from_example_test_suite)