diff --git a/programs/Makefile b/programs/Makefile
index b03e613..590b54e 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -12,45 +12,8 @@
 DLOPEN_LDFLAGS ?=
 endif
 
-include ../3rdparty/Makefile.inc
-LOCAL_CFLAGS+=$(THIRDPARTY_INCLUDES)
-
-ifndef SHARED
-MBEDLIBS=../library/libmbedcrypto.a ../library/libmbedx509.a ../library/libmbedtls.a
-else
-MBEDLIBS=../library/libmbedcrypto.$(DLEXT) ../library/libmbedx509.$(DLEXT) ../library/libmbedtls.$(DLEXT)
-endif
 DEP=${MBEDLIBS} ${MBEDTLS_TEST_OBJS}
 
-ifdef DEBUG
-LOCAL_CFLAGS += -g3
-endif
-
-# if we're running on Windows, build for Windows
-ifdef WINDOWS
-WINDOWS_BUILD=1
-endif
-
-ifdef WINDOWS_BUILD
-  DLEXT=dll
-  EXEXT=.exe
-  LOCAL_LDFLAGS += -lws2_32 -lbcrypt
-  ifdef SHARED
-    SHARED_SUFFIX=.$(DLEXT)
-  endif
-
-else # Not building for Windows
-  DLEXT ?= so
-  EXEXT=
-  SHARED_SUFFIX=
-endif
-
-ifdef WINDOWS
-PYTHON ?= python
-else
-PYTHON ?= $(shell if type python3 >/dev/null 2>/dev/null; then echo python3; else echo python; fi)
-endif
-
 # Only build the dlopen test in shared library builds, and not when building
 # for Windows.
 ifdef BUILD_DLOPEN
@@ -168,14 +131,6 @@
 GENERATED_FILES = psa/psa_constant_names_generated.c test/query_config.c
 generated_files: $(GENERATED_FILES)
 
-# See root Makefile
-GEN_FILES ?= yes
-ifdef GEN_FILES
-gen_file_dep =
-else
-gen_file_dep = |
-endif
-
 psa/psa_constant_names_generated.c: $(gen_file_dep) ../scripts/generate_psa_constants.py
 psa/psa_constant_names_generated.c: $(gen_file_dep) ../include/psa/crypto_values.h
 psa/psa_constant_names_generated.c: $(gen_file_dep) ../include/psa/crypto_extra.h
diff --git a/scripts/common.make b/scripts/common.make
index cee8bd2..12fd27f 100644
--- a/scripts/common.make
+++ b/scripts/common.make
@@ -12,3 +12,53 @@
 		-lmbedtls$(SHARED_SUFFIX)	\
 		-lmbedx509$(SHARED_SUFFIX)	\
 		-lmbedcrypto$(SHARED_SUFFIX)
+
+include ../3rdparty/Makefile.inc
+LOCAL_CFLAGS+=$(THIRDPARTY_INCLUDES)
+
+ifndef SHARED
+MBEDLIBS=../library/libmbedcrypto.a ../library/libmbedx509.a ../library/libmbedtls.a
+else
+MBEDLIBS=../library/libmbedcrypto.$(DLEXT) ../library/libmbedx509.$(DLEXT) ../library/libmbedtls.$(DLEXT)
+endif
+
+ifdef DEBUG
+LOCAL_CFLAGS += -g3
+endif
+
+# if we're running on Windows, build for Windows
+ifdef WINDOWS
+WINDOWS_BUILD=1
+endif
+
+ifdef WINDOWS_BUILD
+  DLEXT=dll
+  EXEXT=.exe
+  LOCAL_LDFLAGS += -lws2_32 -lbcrypt
+  ifdef SHARED
+    SHARED_SUFFIX=.$(DLEXT)
+  endif
+
+else # Not building for Windows
+  DLEXT ?= so
+  EXEXT=
+  SHARED_SUFFIX=
+
+  ifeq ($(THREADING),pthread)
+    LOCAL_LDFLAGS += -lpthread
+  endif
+endif
+
+ifdef WINDOWS
+PYTHON ?= python
+else
+PYTHON ?= $(shell if type python3 >/dev/null 2>/dev/null; then echo python3; else echo python; fi)
+endif
+
+# See root Makefile
+GEN_FILES ?= yes
+ifdef GEN_FILES
+gen_file_dep =
+else
+gen_file_dep = |
+endif
diff --git a/tests/Makefile b/tests/Makefile
index 3a6fd59..8e4149b 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -8,65 +8,15 @@
 # Also include library headers, for the sake of invasive tests.
 LOCAL_CFLAGS += -I../library
 
-include ../3rdparty/Makefile.inc
-LOCAL_CFLAGS+=$(THIRDPARTY_INCLUDES)
-
 # Enable definition of various functions used throughout the testsuite
 # (gethostname, strdup, fileno...) even when compiling with -std=c99. Harmless
 # on non-POSIX platforms.
 LOCAL_CFLAGS += -D_POSIX_C_SOURCE=200809L
 
-ifndef SHARED
-MBEDLIBS=../library/libmbedcrypto.a ../library/libmbedx509.a ../library/libmbedtls.a
-else
-MBEDLIBS=../library/libmbedcrypto.$(DLEXT) ../library/libmbedx509.$(DLEXT) ../library/libmbedtls.$(DLEXT)
-endif
-
-ifdef DEBUG
-LOCAL_CFLAGS += -g3
-endif
-
 ifdef RECORD_PSA_STATUS_COVERAGE_LOG
 LOCAL_CFLAGS += -Werror -DRECORD_PSA_STATUS_COVERAGE_LOG
 endif
 
-# if we're running on Windows, build for Windows
-ifdef WINDOWS
-WINDOWS_BUILD=1
-endif
-
-ifdef WINDOWS_BUILD
-  DLEXT=dll
-  EXEXT=.exe
-  LOCAL_LDFLAGS += -lws2_32 -lbcrypt
-  ifdef SHARED
-    SHARED_SUFFIX=.$(DLEXT)
-  endif
-
-else # Not building for Windows
-  DLEXT ?= so
-  EXEXT=
-  SHARED_SUFFIX=
-
-  ifeq ($(THREADING),pthread)
-    LOCAL_LDFLAGS += -lpthread
-  endif
-endif
-
-ifdef WINDOWS
-PYTHON ?= python
-else
-PYTHON ?= $(shell if type python3 >/dev/null 2>/dev/null; then echo python3; else echo python; fi)
-endif
-
-# See root Makefile
-GEN_FILES ?= yes
-ifdef GEN_FILES
-gen_file_dep =
-else
-gen_file_dep = |
-endif
-
 .PHONY: generated_files
 GENERATED_BIGNUM_DATA_FILES := $(patsubst tests/%,%,$(shell \
 	$(PYTHON) scripts/generate_bignum_tests.py --list || \