diff --git a/flang/test/Semantics/OpenACC/acc-symbols01.f90 b/flang/test/Semantics/OpenACC/acc-symbols01.f90
--- a/flang/test/Semantics/OpenACC/acc-symbols01.f90
+++ b/flang/test/Semantics/OpenACC/acc-symbols01.f90
@@ -1,5 +1,4 @@
-! RUN: %S/../test_symbols.sh %s %t %flang_fc1 -fopenacc
-! REQUIRES: shell
+! RUN: python %S/../test_symbols.py %s %t %flang_fc1 -fopenacc
 
 !DEF: /mm MainProgram
 program mm
diff --git a/flang/test/Semantics/common.py b/flang/test/Semantics/common.py
new file mode 100755
--- /dev/null
+++ b/flang/test/Semantics/common.py
@@ -0,0 +1,69 @@
+#!/usr/bin/python3
+
+import os
+import sys
+import platform
+from pathlib import Path
+
+
+class Common:
+    """Provides common functionality to the test scripts
+    Expects source files passed as first argument;
+    A temporary directory as second argument;
+    And the Flang frontend driver with options as third argument"""
+
+    def __init__(self, arguments):
+        self.os = platform.system()
+        self.test = arguments[0]
+        self.args = arguments[1:]
+
+    def set_source(self):
+        self.path_source = Path(self.args[0])
+        if self.path_source.is_file() is False:
+            self.die(self.path_source)
+
+    def set_temp(self):
+        self.path_temp = Path(self.args[1])
+        os.makedirs(self.path_temp, exist_ok=True)
+
+    def set_executable(self):
+        self.flang_fc1 = Path(self.args[2])
+        self.flang_fc1_args = self.args[3:]
+        if self.flang_fc1.is_file() is False:
+            self.die(self.flang_fc1)
+
+    def die(self, file=None):
+        if file is None:
+            print(self.test + ": " + "FAIL")
+        else:
+            print(self.test + ": " + "File not found: " + str(file))
+        sys.exit(1)
+
+    def check_args(self):
+        if len(self.args) < 3:
+            print("Usage: {test_name} <fortran-source> <temp test dir>\
+                    <f18-command>".format(self.test))
+            sys.exit(1)
+
+    def get_src(self):
+        return self.path_source
+
+    def get_tmp(self):
+        return self.path_temp
+
+    def get_exec(self):
+        return self.flang_fc1
+
+    def get_args(self):
+        return self.flang_fc1_args
+
+    def main(self):
+        self.check_args()
+        self.set_source()
+        self.set_temp()
+        self.set_executable()
+
+if __name__ == '__main__':
+    program = Common(sys.argv)
+    program.main()
+
diff --git a/flang/test/Semantics/common.sh b/flang/test/Semantics/common.sh
deleted file mode 100644
--- a/flang/test/Semantics/common.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-# Common functionality for test scripts
-# Process arguments, expecting source file as 1st; optional path to f18 as 2nd
-# Set: $FLANG_FC1 to the path to the Flang frontend driver with options; $temp
-# to an empty temp directory; and $src to the full path of the single source
-# argument.
-
-function die {
-  echo "$(basename $0): $*" >&2
-  exit 1
-}
-if [[ $# < 3 ]]; then
-  echo "Usage: $(basename $0) <fortran-source> <temp test dir> <f18-command>"
-  exit 1
-fi
-
-case $1 in
-  (/*) src="$1" ;;
-  (*) src="$(dirname $0)/$1" ;;
-esac
-shift
-temp=$1
-mkdir -p $temp
-shift
-
-[[ ! -f $1 ]] && die "f18 executable not found: $1"
-FLANG_FC1="$*"
diff --git a/flang/test/Semantics/kinds01.f90 b/flang/test/Semantics/kinds01.f90
--- a/flang/test/Semantics/kinds01.f90
+++ b/flang/test/Semantics/kinds01.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
  !DEF: /MainProgram1/jk1 ObjectEntity INTEGER(1)
  integer(kind=1) jk1
  !DEF: /MainProgram1/js1 ObjectEntity INTEGER(1)
diff --git a/flang/test/Semantics/kinds03.f90 b/flang/test/Semantics/kinds03.f90
--- a/flang/test/Semantics/kinds03.f90
+++ b/flang/test/Semantics/kinds03.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
  !DEF: /MainProgram1/ipdt DerivedType
  !DEF: /MainProgram1/ipdt/k TypeParam INTEGER(4)
  type :: ipdt(k)
diff --git a/flang/test/Semantics/omp-do-schedule03.f90 b/flang/test/Semantics/omp-do-schedule03.f90
--- a/flang/test/Semantics/omp-do-schedule03.f90
+++ b/flang/test/Semantics/omp-do-schedule03.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Schedule Clause
 ! Test that does not catch non constant integer expressions like xx - xx.
diff --git a/flang/test/Semantics/omp-do-schedule04.f90 b/flang/test/Semantics/omp-do-schedule04.f90
--- a/flang/test/Semantics/omp-do-schedule04.f90
+++ b/flang/test/Semantics/omp-do-schedule04.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Schedule Clause
 ! Test that does not catch non constant integer expressions like xx - yy.
diff --git a/flang/test/Semantics/omp-do01-positivecase.f90 b/flang/test/Semantics/omp-do01-positivecase.f90
--- a/flang/test/Semantics/omp-do01-positivecase.f90
+++ b/flang/test/Semantics/omp-do01-positivecase.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Loop Construct
 ! The loop iteration variable may not appear in a firstprivate directive.
diff --git a/flang/test/Semantics/omp-do04-positivecase.f90 b/flang/test/Semantics/omp-do04-positivecase.f90
--- a/flang/test/Semantics/omp-do04-positivecase.f90
+++ b/flang/test/Semantics/omp-do04-positivecase.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Do Loop Constructs
 
diff --git a/flang/test/Semantics/omp-do05-positivecase.f90 b/flang/test/Semantics/omp-do05-positivecase.f90
--- a/flang/test/Semantics/omp-do05-positivecase.f90
+++ b/flang/test/Semantics/omp-do05-positivecase.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Loop Construct restrictions on single directive.
 ! A positive case
diff --git a/flang/test/Semantics/omp-do06-positivecases.f90 b/flang/test/Semantics/omp-do06-positivecases.f90
--- a/flang/test/Semantics/omp-do06-positivecases.f90
+++ b/flang/test/Semantics/omp-do06-positivecases.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Loop Construct
 ! The ordered clause must be present on the loop construct if any ordered
diff --git a/flang/test/Semantics/omp-do11.f90 b/flang/test/Semantics/omp-do11.f90
--- a/flang/test/Semantics/omp-do11.f90
+++ b/flang/test/Semantics/omp-do11.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Do Loop Constructs
 
diff --git a/flang/test/Semantics/omp-do12.f90 b/flang/test/Semantics/omp-do12.f90
--- a/flang/test/Semantics/omp-do12.f90
+++ b/flang/test/Semantics/omp-do12.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Do Loop constructs.
 
diff --git a/flang/test/Semantics/omp-do14.f90 b/flang/test/Semantics/omp-do14.f90
--- a/flang/test/Semantics/omp-do14.f90
+++ b/flang/test/Semantics/omp-do14.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Do Loop constructs.
 
diff --git a/flang/test/Semantics/omp-do17.f90 b/flang/test/Semantics/omp-do17.f90
--- a/flang/test/Semantics/omp-do17.f90
+++ b/flang/test/Semantics/omp-do17.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.7.1 Do Loop constructs.
 
diff --git a/flang/test/Semantics/omp-reduction08.f90 b/flang/test/Semantics/omp-reduction08.f90
--- a/flang/test/Semantics/omp-reduction08.f90
+++ b/flang/test/Semantics/omp-reduction08.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.15.3.6 Reduction Clause Positive cases
 
diff --git a/flang/test/Semantics/omp-reduction09.f90 b/flang/test/Semantics/omp-reduction09.f90
--- a/flang/test/Semantics/omp-reduction09.f90
+++ b/flang/test/Semantics/omp-reduction09.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 ! OpenMP Version 4.5
 ! 2.15.3.6 Reduction Clause Positive cases.
 !DEF: /omp_reduction MainProgram
diff --git a/flang/test/Semantics/omp-symbol01.f90 b/flang/test/Semantics/omp-symbol01.f90
--- a/flang/test/Semantics/omp-symbol01.f90
+++ b/flang/test/Semantics/omp-symbol01.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! Test clauses that accept list.
 ! 2.1 Directive Format
diff --git a/flang/test/Semantics/omp-symbol02.f90 b/flang/test/Semantics/omp-symbol02.f90
--- a/flang/test/Semantics/omp-symbol02.f90
+++ b/flang/test/Semantics/omp-symbol02.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! 1.4.1 Structure of the OpenMP Memory Model
 
diff --git a/flang/test/Semantics/omp-symbol03.f90 b/flang/test/Semantics/omp-symbol03.f90
--- a/flang/test/Semantics/omp-symbol03.f90
+++ b/flang/test/Semantics/omp-symbol03.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! 1.4.1 Structure of the OpenMP Memory Model
 ! In the inner OpenMP region, SHARED `a` refers to the `a` in the outer OpenMP
diff --git a/flang/test/Semantics/omp-symbol04.f90 b/flang/test/Semantics/omp-symbol04.f90
--- a/flang/test/Semantics/omp-symbol04.f90
+++ b/flang/test/Semantics/omp-symbol04.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! 2.15.3 Data-Sharing Attribute Clauses
 ! Both PARALLEL and DO (worksharing) directives need to create new scope,
diff --git a/flang/test/Semantics/omp-symbol05.f90 b/flang/test/Semantics/omp-symbol05.f90
--- a/flang/test/Semantics/omp-symbol05.f90
+++ b/flang/test/Semantics/omp-symbol05.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! 2.15.2 threadprivate Directive
 ! The threadprivate directive specifies that variables are replicated,
diff --git a/flang/test/Semantics/omp-symbol06.f90 b/flang/test/Semantics/omp-symbol06.f90
--- a/flang/test/Semantics/omp-symbol06.f90
+++ b/flang/test/Semantics/omp-symbol06.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! 2.15.3 Data-Sharing Attribute Clauses
 ! A list item that specifies a given variable may not appear in more than
diff --git a/flang/test/Semantics/omp-symbol07.f90 b/flang/test/Semantics/omp-symbol07.f90
--- a/flang/test/Semantics/omp-symbol07.f90
+++ b/flang/test/Semantics/omp-symbol07.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! Generic tests
 !   1. subroutine or function calls should not be fixed for DSA or DMA
diff --git a/flang/test/Semantics/omp-symbol08.f90 b/flang/test/Semantics/omp-symbol08.f90
--- a/flang/test/Semantics/omp-symbol08.f90
+++ b/flang/test/Semantics/omp-symbol08.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1 -fopenmp
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1 -fopenmp
 
 ! 2.15.1.1 Predetermined rules for associated do-loops index variable
 !   a) The loop iteration variable(s) in the associated do-loop(s) of a do,
diff --git a/flang/test/Semantics/procinterface01.f90 b/flang/test/Semantics/procinterface01.f90
--- a/flang/test/Semantics/procinterface01.f90
+++ b/flang/test/Semantics/procinterface01.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Tests for "proc-interface" semantics.
 ! These cases are all valid.
 
diff --git a/flang/test/Semantics/symbol01.f90 b/flang/test/Semantics/symbol01.f90
--- a/flang/test/Semantics/symbol01.f90
+++ b/flang/test/Semantics/symbol01.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Test that intent-stmt and subprogram prefix and suffix are resolved.
 
 !DEF: /m Module
diff --git a/flang/test/Semantics/symbol03.f90 b/flang/test/Semantics/symbol03.f90
--- a/flang/test/Semantics/symbol03.f90
+++ b/flang/test/Semantics/symbol03.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Test host association in internal subroutine of main program.
 
 !DEF: /main MainProgram
diff --git a/flang/test/Semantics/symbol05.f90 b/flang/test/Semantics/symbol05.f90
--- a/flang/test/Semantics/symbol05.f90
+++ b/flang/test/Semantics/symbol05.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Explicit and implicit entities in blocks
 
 !DEF: /s1 (Subroutine) Subprogram
diff --git a/flang/test/Semantics/symbol06.f90 b/flang/test/Semantics/symbol06.f90
--- a/flang/test/Semantics/symbol06.f90
+++ b/flang/test/Semantics/symbol06.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 !DEF: /main MainProgram
 program main
  !DEF: /main/t1 DerivedType
diff --git a/flang/test/Semantics/symbol07.f90 b/flang/test/Semantics/symbol07.f90
--- a/flang/test/Semantics/symbol07.f90
+++ b/flang/test/Semantics/symbol07.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 !DEF: /main MainProgram
 program main
  implicit complex(z)
diff --git a/flang/test/Semantics/symbol08.f90 b/flang/test/Semantics/symbol08.f90
--- a/flang/test/Semantics/symbol08.f90
+++ b/flang/test/Semantics/symbol08.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 !DEF: /main MainProgram
 program main
  !DEF: /main/x POINTER ObjectEntity REAL(4)
diff --git a/flang/test/Semantics/symbol09.f90 b/flang/test/Semantics/symbol09.f90
--- a/flang/test/Semantics/symbol09.f90
+++ b/flang/test/Semantics/symbol09.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 !DEF: /s1 (Subroutine) Subprogram
 subroutine s1
  !DEF: /s1/a ObjectEntity REAL(4)
diff --git a/flang/test/Semantics/symbol10.f90 b/flang/test/Semantics/symbol10.f90
--- a/flang/test/Semantics/symbol10.f90
+++ b/flang/test/Semantics/symbol10.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 !DEF: /m1 Module
 module m1
 contains
diff --git a/flang/test/Semantics/symbol11.f90 b/flang/test/Semantics/symbol11.f90
--- a/flang/test/Semantics/symbol11.f90
+++ b/flang/test/Semantics/symbol11.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 !DEF: /s1 (Subroutine) Subprogram
 subroutine s1
  implicit none
diff --git a/flang/test/Semantics/symbol12.f90 b/flang/test/Semantics/symbol12.f90
--- a/flang/test/Semantics/symbol12.f90
+++ b/flang/test/Semantics/symbol12.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Verify that SAVE attribute is propagated by EQUIVALENCE
 
 !DEF: /s1 (Subroutine) Subprogram
diff --git a/flang/test/Semantics/symbol13.f90 b/flang/test/Semantics/symbol13.f90
--- a/flang/test/Semantics/symbol13.f90
+++ b/flang/test/Semantics/symbol13.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Old-style "*length" specifiers (R723)
 
 !DEF: /f1 (Function) Subprogram CHARACTER(1_8,1)
diff --git a/flang/test/Semantics/symbol14.f90 b/flang/test/Semantics/symbol14.f90
--- a/flang/test/Semantics/symbol14.f90
+++ b/flang/test/Semantics/symbol14.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! "Bare" uses of type parameters and components
 
  !DEF: /MainProgram1/t1 DerivedType
diff --git a/flang/test/Semantics/symbol15.f90 b/flang/test/Semantics/symbol15.f90
--- a/flang/test/Semantics/symbol15.f90
+++ b/flang/test/Semantics/symbol15.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Forward references in pointer initializers and TBP bindings.
 
 !DEF: /m Module
diff --git a/flang/test/Semantics/symbol16.f90 b/flang/test/Semantics/symbol16.f90
--- a/flang/test/Semantics/symbol16.f90
+++ b/flang/test/Semantics/symbol16.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Statement functions
 
 !DEF: /p1 MainProgram
diff --git a/flang/test/Semantics/symbol17.f90 b/flang/test/Semantics/symbol17.f90
--- a/flang/test/Semantics/symbol17.f90
+++ b/flang/test/Semantics/symbol17.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 ! Forward references to derived types (non-error cases)
 
 !DEF: /main MainProgram
diff --git a/flang/test/Semantics/symbol18.f90 b/flang/test/Semantics/symbol18.f90
--- a/flang/test/Semantics/symbol18.f90
+++ b/flang/test/Semantics/symbol18.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 
 ! Intrinsic function in type declaration statement: type is ignored
 
diff --git a/flang/test/Semantics/symbol19.f90 b/flang/test/Semantics/symbol19.f90
--- a/flang/test/Semantics/symbol19.f90
+++ b/flang/test/Semantics/symbol19.f90
@@ -1,5 +1,4 @@
-! RUN: %S/test_symbols.sh %s %t %flang_fc1
-! REQUIRES: shell
+! RUN: python %S/test_symbols.py %s %t %flang_fc1
 
 ! Test that a procedure is only implicitly resolved as an intrinsic function
 ! (resp. subroutine) if this is a function (resp. subroutine)
diff --git a/flang/test/Semantics/test_symbols.py b/flang/test/Semantics/test_symbols.py
new file mode 100755
--- /dev/null
+++ b/flang/test/Semantics/test_symbols.py
@@ -0,0 +1,79 @@
+#!/usr/bin/python3
+
+# Compiles a source file with "-fdebug-unparse-with-symbols' and verifies
+# we get the right symbols in the output, i.e. the output should be
+# the same as the input, except for the copyright comment.
+import os
+import sys
+import platform
+import re
+import subprocess
+
+from difflib import unified_diff
+from pathlib import Path, PurePath
+from common import Common
+
+func = Common(sys.argv)
+func.main()
+
+src = func.get_src()
+tmp = func.get_tmp()
+src1 = PurePath(tmp).joinpath("1.f90")
+src2 = PurePath(tmp).joinpath("2.f90")
+src3 = PurePath(tmp).joinpath("3.f90")
+diffs = PurePath(tmp).joinpath("diffs")
+
+flang_fc1 = func.get_exec()
+flang_fc1_args = func.get_args()
+flang_fc1_options = "-fdebug-unparse-with-symbols"
+
+cmd = [str(flang_fc1), flang_fc1_args, flang_fc1_options, str(src2)]
+
+# Strips out blak lines and all comments except for "!DEF:", "!REF:", and "!$omp"
+with open(src, 'r') as text_in, \
+        open(src1, 'w') as text_out:
+            for line in text_in:
+
+                text = re.sub("!(?![DR]EF:|\$omp|\$acc).*", "", line)
+                text = re.sub("^\s*$", "", text)
+                text_out.write(text)
+
+# Strips out "!DEF:" ad "!REF:" comments
+with open(src1, 'r') as text_in, \
+        open(src2, 'w') as text_out:
+            for line in text_in:
+
+                text = re.sub("![DR]EF:.*", "", line)
+                text = re.sub("^\s*$", "", text)
+                text_out.write(text)
+
+# Compiles, inserting comments for symbols:
+with open(src3, 'w') as text_out:
+    proc = subprocess.Popen(cmd, universal_newlines=True, stdout=subprocess.PIPE)
+    text = proc.communicate()[0]
+    text_out.write(text)
+
+# Removes all whitespace to compare diffrences in files
+diff1 = open(src1).readlines()
+diff1 = [x.replace(" ", "") for x in diff1]
+diff2 = open(src3).readlines()
+diff2 = [x.replace(" ", "") for x in diff2]
+diff_check = ""
+
+# Compares the input with the output
+with open(diffs, 'w') as diffs:
+    for line in unified_diff(diff1, diff2, n=999999, fromfile="1.90", tofile="3.f90"):
+        diffs.write(line)
+        line = re.sub("^\s*$", "", line)
+        diff_check = diff_check + line
+
+if diff_check != "":
+    print(diff_check)
+    print("")
+    print("FAIL")
+    sys.exit(1)
+else:
+    print()
+    print("PASS")
+    sys.exit(0)
+
diff --git a/flang/test/Semantics/test_symbols.sh b/flang/test/Semantics/test_symbols.sh
deleted file mode 100755
--- a/flang/test/Semantics/test_symbols.sh
+++ /dev/null
@@ -1,34 +0,0 @@
-#!/usr/bin/env bash
-# Compile a source file with '-fdebug-unparse-with-symbols' and verify
-# we get the right symbols in the output, i.e. the output should be
-# the same as the input, except for the copyright comment.
-# Change the frontend driver by setting the FLANG_FC1 environment variable.
-
-FLANG_FC1_OPTIONS="-fdebug-unparse-with-symbols"
-srcdir=$(dirname $0)
-source $srcdir/common.sh
-[[ ! -f $src ]] && echo "File not found: $src" && exit 1
-
-src1=$temp/1.f90
-src2=$temp/2.f90
-src3=$temp/3.f90
-diffs=$temp/diffs
-
-# Strip out blank lines and all comments except "!DEF:", "!REF:", and "!$omp"
-sed -e 's/!\([DR]EF:\)/KEEP \1/' -e 's/!\($omp\)/KEEP \1/' \
-  -e 's/!\($acc\)/KEEP \1/' -e 's/!.*//' -e 's/ *$//' -e '/^$/d' \
-  -e 's/KEEP \([DR]EF:\)/!\1/' -e 's/KEEP \($omp\)/!\1/' \
-  -e 's/KEEP \($acc\)/!\1/' \
-  $src > $src1
-egrep -v '![DR]EF:' $src1 > $src2  # strip out DEF and REF comments
-# compile, inserting comments for symbols:
-( cd $temp; $FLANG_FC1 $FLANG_FC1_OPTIONS $(basename $src2) ) > $src3
-
-if diff -w -U999999 $src1 $src3 > $diffs; then
-  echo PASS
-else
-  sed '1,/^\@\@/d' $diffs
-  echo
-  echo FAIL
-  exit 1
-fi