diff --git a/Makefile b/Makefile
index dbf510a3e..b51ae6cc7 100644
--- a/Makefile
+++ b/Makefile
@@ -38,18 +38,6 @@ makefiles += \
 endif
 endif
 
-ifeq ($(ENABLE_UNIT_TESTS), yes)
-makefiles += \
-  tests/unit/libutil/local.mk \
-  tests/unit/libutil-support/local.mk \
-  tests/unit/libstore/local.mk \
-  tests/unit/libstore-support/local.mk \
-  tests/unit/libfetchers/local.mk \
-  tests/unit/libexpr/local.mk \
-  tests/unit/libexpr-support/local.mk \
-  tests/unit/libflake/local.mk
-endif
-
 ifeq ($(ENABLE_FUNCTIONAL_TESTS), yes)
 ifdef HOST_UNIX
 makefiles += \
@@ -104,13 +92,6 @@ include mk/lib.mk
 # These must be defined after `mk/lib.mk`. Otherwise the first rule
 # incorrectly becomes the default target.
 
-ifneq ($(ENABLE_UNIT_TESTS), yes)
-.PHONY: check
-check:
-	@echo "Unit tests are disabled. Configure without '--disable-unit-tests', or avoid calling 'make check'."
-	@exit 1
-endif
-
 ifneq ($(ENABLE_FUNCTIONAL_TESTS), yes)
 .PHONY: installcheck
 installcheck:
diff --git a/Makefile.config.in b/Makefile.config.in
index 3100d2073..e131484f6 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -12,7 +12,6 @@ ENABLE_BUILD = @ENABLE_BUILD@
 ENABLE_DOC_GEN = @ENABLE_DOC_GEN@
 ENABLE_FUNCTIONAL_TESTS = @ENABLE_FUNCTIONAL_TESTS@
 ENABLE_S3 = @ENABLE_S3@
-ENABLE_UNIT_TESTS = @ENABLE_UNIT_TESTS@
 GTEST_LIBS = @GTEST_LIBS@
 HAVE_LIBCPUID = @HAVE_LIBCPUID@
 HAVE_SECCOMP = @HAVE_SECCOMP@
diff --git a/configure.ac b/configure.ac
index 5c22ed176..18d718c07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -141,18 +141,6 @@ AC_ARG_ENABLE(build, AS_HELP_STRING([--disable-build],[Do not build nix]),
   ENABLE_BUILD=$enableval, ENABLE_BUILD=yes)
 AC_SUBST(ENABLE_BUILD)
 
-# Building without unit tests is useful for bootstrapping with a smaller footprint
-# or running the tests in a separate derivation. Otherwise, we do compile and
-# run them.
-
-AC_ARG_ENABLE(unit-tests, AS_HELP_STRING([--disable-unit-tests],[Do not build the tests]),
-  ENABLE_UNIT_TESTS=$enableval, ENABLE_UNIT_TESTS=$ENABLE_BUILD)
-AC_SUBST(ENABLE_UNIT_TESTS)
-
-AS_IF(
-  [test "$ENABLE_BUILD" == "no" && test "$ENABLE_UNIT_TESTS" == "yes"],
-  [AC_MSG_ERROR([Cannot enable unit tests when building overall is disabled. Please do not pass '--enable-unit-tests' or do not pass '--disable-build'.])])
-
 AC_ARG_ENABLE(functional-tests, AS_HELP_STRING([--disable-functional-tests],[Do not build the tests]),
   ENABLE_FUNCTIONAL_TESTS=$enableval, ENABLE_FUNCTIONAL_TESTS=yes)
 AC_SUBST(ENABLE_FUNCTIONAL_TESTS)
@@ -358,16 +346,6 @@ if test "$gc" = yes; then
   CFLAGS="$old_CFLAGS"
 fi
 
-AS_IF([test "$ENABLE_UNIT_TESTS" == "yes"],[
-
-# Look for gtest.
-PKG_CHECK_MODULES([GTEST], [gtest_main gmock_main])
-
-# Look for rapidcheck.
-PKG_CHECK_MODULES([RAPIDCHECK], [rapidcheck rapidcheck_gtest])
-
-])
-
 # Look for nlohmann/json.
 PKG_CHECK_MODULES([NLOHMANN_JSON], [nlohmann_json >= 3.9])
 
diff --git a/package.nix b/package.nix
index d41748b7c..c0d04179d 100644
--- a/package.nix
+++ b/package.nix
@@ -53,10 +53,6 @@
 # Whether to build Nix. Useful to skip for tasks like testing existing pre-built versions of Nix
 , doBuild ? true
 
-# Run the unit tests as part of the build. See `installUnitTests` for an
-# alternative to this.
-, doCheck ? __forDefaults.canRunInstalled
-
 # Run the functional tests as part of the build.
 , doInstallCheck ? test-client != null || __forDefaults.canRunInstalled
 
@@ -89,11 +85,6 @@
 # - readline
 , readlineFlavor ? if stdenv.hostPlatform.isWindows then "readline" else "editline"
 
-# Whether to install unit tests. This is useful when cross compiling
-# since we cannot run them natively during the build, but can do so
-# later.
-, installUnitTests ? doBuild && !__forDefaults.canExecuteHost
-
 # For running the functional tests against a pre-built Nix. Probably
 # want to use in conjunction with `doBuild = false;`.
 , test-daemon ? null
@@ -117,7 +108,7 @@ let
   # things which should instead be gotten via `finalAttrs` in order to
   # work with overriding.
   attrs = {
-    inherit doBuild doCheck doInstallCheck;
+    inherit doBuild doInstallCheck;
   };
 
   mkDerivation =
@@ -133,16 +124,11 @@ in
 mkDerivation (finalAttrs: let
 
   inherit (finalAttrs)
-    doCheck
     doInstallCheck
     ;
 
   doBuild = !finalAttrs.dontBuild;
 
-  # Either running the unit tests during the build, or installing them
-  # to be run later, requiresthe unit tests to be built.
-  buildUnitTests = doCheck || installUnitTests;
-
 in {
   inherit pname version;
 
@@ -176,8 +162,6 @@ in {
           ./scripts/local.mk
         ] ++ lib.optionals enableManual [
           ./doc/manual
-        ] ++ lib.optionals buildUnitTests [
-          ./tests/unit
         ] ++ lib.optionals doInstallCheck [
           ./tests/functional
         ]));
@@ -190,8 +174,6 @@ in {
     # If we are doing just build or just docs, the one thing will use
     # "out". We only need additional outputs if we are doing both.
     ++ lib.optional (doBuild && enableManual) "doc"
-    ++ lib.optional installUnitTests "check"
-    ++ lib.optional doCheck "testresults"
     ;
 
   nativeBuildInputs = [
@@ -230,9 +212,6 @@ in {
     ({ inherit readline editline; }.${readlineFlavor})
   ] ++ lib.optionals enableMarkdown [
     lowdown
-  ] ++ lib.optionals buildUnitTests [
-    gtest
-    rapidcheck
   ] ++ lib.optional stdenv.isLinux libseccomp
     ++ lib.optional stdenv.hostPlatform.isx86_64 libcpuid
     # There have been issues building these dependencies
@@ -247,22 +226,16 @@ in {
   );
 
   dontBuild = !attrs.doBuild;
-  doCheck = attrs.doCheck;
 
   configureFlags = [
     (lib.enableFeature doBuild "build")
-    (lib.enableFeature buildUnitTests "unit-tests")
     (lib.enableFeature doInstallCheck "functional-tests")
     (lib.enableFeature enableManual "doc-gen")
     (lib.enableFeature enableGC "gc")
     (lib.enableFeature enableMarkdown "markdown")
-    (lib.enableFeature installUnitTests "install-unit-tests")
     (lib.withFeatureAs true "readline-flavor" readlineFlavor)
   ] ++ lib.optionals (!forDevShell) [
     "--sysconfdir=/etc"
-  ] ++ lib.optionals installUnitTests [
-    "--with-check-bin-dir=${builtins.placeholder "check"}/bin"
-    "--with-check-lib-dir=${builtins.placeholder "check"}/lib"
   ] ++ lib.optionals (doBuild) [
     "--with-boost=${boost}/lib"
   ] ++ lib.optionals (doBuild && stdenv.isLinux) [
@@ -343,10 +316,6 @@ in {
     platforms = lib.platforms.unix ++ lib.platforms.windows;
     mainProgram = "nix";
     broken = !(lib.all (a: a) [
-      # We cannot run or install unit tests if we don't build them or
-      # Nix proper (which they depend on).
-      (installUnitTests -> doBuild)
-      (doCheck -> doBuild)
       # The build process for the manual currently requires extracting
       # data from the Nix executable we are trying to document.
       (enableManual -> doBuild)
diff --git a/tests/unit/libexpr-support/local.mk b/tests/unit/libexpr-support/local.mk
deleted file mode 100644
index 0501de33c..000000000
--- a/tests/unit/libexpr-support/local.mk
+++ /dev/null
@@ -1,23 +0,0 @@
-libraries += libexpr-test-support
-
-libexpr-test-support_NAME = libnixexpr-test-support
-
-libexpr-test-support_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libexpr-test-support_INSTALL_DIR := $(checklibdir)
-else
-  libexpr-test-support_INSTALL_DIR :=
-endif
-
-libexpr-test-support_SOURCES := \
-    $(wildcard $(d)/tests/*.cc) \
-    $(wildcard $(d)/tests/value/*.cc)
-
-libexpr-test-support_CXXFLAGS += $(libexpr-tests_EXTRA_INCLUDES)
-
-libexpr-test-support_LIBS = \
-    libstore-test-support libutil-test-support \
-    libexpr libstore libutil
-
-libexpr-test-support_LDFLAGS := $(THREAD_LDFLAGS) -lrapidcheck
diff --git a/tests/unit/libexpr/local.mk b/tests/unit/libexpr/local.mk
deleted file mode 100644
index 1617e2823..000000000
--- a/tests/unit/libexpr/local.mk
+++ /dev/null
@@ -1,45 +0,0 @@
-check: libexpr-tests_RUN
-
-programs += libexpr-tests
-
-libexpr-tests_NAME := libnixexpr-tests
-
-libexpr-tests_ENV := _NIX_TEST_UNIT_DATA=$(d)/data GTEST_OUTPUT=xml:$$testresults/libexpr-tests.xml
-
-libexpr-tests_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libexpr-tests_INSTALL_DIR := $(checkbindir)
-else
-  libexpr-tests_INSTALL_DIR :=
-endif
-
-libexpr-tests_SOURCES := \
-    $(wildcard $(d)/*.cc) \
-    $(wildcard $(d)/value/*.cc) \
-    $(wildcard $(d)/flake/*.cc)
-
-libexpr-tests_EXTRA_INCLUDES = \
-    -I tests/unit/libexpr-support \
-    -I tests/unit/libstore-support \
-    -I tests/unit/libutil-support \
-    $(INCLUDE_libexpr) \
-    $(INCLUDE_libexprc) \
-    $(INCLUDE_libfetchers) \
-    $(INCLUDE_libstore) \
-    $(INCLUDE_libstorec) \
-    $(INCLUDE_libutil) \
-    $(INCLUDE_libutilc)
-
-libexpr-tests_CXXFLAGS += $(libexpr-tests_EXTRA_INCLUDES)
-
-libexpr-tests_LIBS = \
-    libexpr-test-support libstore-test-support libutil-test-support \
-    libexpr libexprc libfetchers libstore libstorec libutil libutilc
-
-libexpr-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS) -lgmock
-
-ifdef HOST_WINDOWS
-  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
-  libexpr-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
-endif
diff --git a/tests/unit/libfetchers/local.mk b/tests/unit/libfetchers/local.mk
deleted file mode 100644
index 30aa142a5..000000000
--- a/tests/unit/libfetchers/local.mk
+++ /dev/null
@@ -1,37 +0,0 @@
-check: libfetchers-tests_RUN
-
-programs += libfetchers-tests
-
-libfetchers-tests_NAME = libnixfetchers-tests
-
-libfetchers-tests_ENV := _NIX_TEST_UNIT_DATA=$(d)/data GTEST_OUTPUT=xml:$$testresults/libfetchers-tests.xml
-
-libfetchers-tests_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libfetchers-tests_INSTALL_DIR := $(checkbindir)
-else
-  libfetchers-tests_INSTALL_DIR :=
-endif
-
-libfetchers-tests_SOURCES := $(wildcard $(d)/*.cc)
-
-libfetchers-tests_EXTRA_INCLUDES = \
-    -I tests/unit/libstore-support \
-    -I tests/unit/libutil-support \
-    $(INCLUDE_libfetchers) \
-    $(INCLUDE_libstore) \
-    $(INCLUDE_libutil)
-
-libfetchers-tests_CXXFLAGS += $(libfetchers-tests_EXTRA_INCLUDES)
-
-libfetchers-tests_LIBS = \
-    libstore-test-support libutil-test-support \
-    libfetchers libstore libutil
-
-libfetchers-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS) $(LIBGIT2_LIBS)
-
-ifdef HOST_WINDOWS
-  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
-  libfetchers-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
-endif
diff --git a/tests/unit/libflake/local.mk b/tests/unit/libflake/local.mk
deleted file mode 100644
index 590bcf7c0..000000000
--- a/tests/unit/libflake/local.mk
+++ /dev/null
@@ -1,43 +0,0 @@
-check: libflake-tests_RUN
-
-programs += libflake-tests
-
-libflake-tests_NAME := libnixflake-tests
-
-libflake-tests_ENV := _NIX_TEST_UNIT_DATA=$(d)/data GTEST_OUTPUT=xml:$$testresults/libflake-tests.xml
-
-libflake-tests_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libflake-tests_INSTALL_DIR := $(checkbindir)
-else
-  libflake-tests_INSTALL_DIR :=
-endif
-
-libflake-tests_SOURCES := \
-    $(wildcard $(d)/*.cc) \
-    $(wildcard $(d)/value/*.cc) \
-    $(wildcard $(d)/flake/*.cc)
-
-libflake-tests_EXTRA_INCLUDES = \
-    -I tests/unit/libflake-support \
-    -I tests/unit/libstore-support \
-    -I tests/unit/libutil-support \
-    $(INCLUDE_libflake) \
-    $(INCLUDE_libexpr) \
-    $(INCLUDE_libfetchers) \
-    $(INCLUDE_libstore) \
-    $(INCLUDE_libutil) \
-
-libflake-tests_CXXFLAGS += $(libflake-tests_EXTRA_INCLUDES)
-
-libflake-tests_LIBS = \
-    libexpr-test-support libstore-test-support libutil-test-support \
-    libflake libexpr libfetchers libstore libutil
-
-libflake-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS) -lgmock
-
-ifdef HOST_WINDOWS
-  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
-  libflake-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
-endif
diff --git a/tests/unit/libstore-support/local.mk b/tests/unit/libstore-support/local.mk
deleted file mode 100644
index 56dedd825..000000000
--- a/tests/unit/libstore-support/local.mk
+++ /dev/null
@@ -1,21 +0,0 @@
-libraries += libstore-test-support
-
-libstore-test-support_NAME = libnixstore-test-support
-
-libstore-test-support_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libstore-test-support_INSTALL_DIR := $(checklibdir)
-else
-  libstore-test-support_INSTALL_DIR :=
-endif
-
-libstore-test-support_SOURCES := $(wildcard $(d)/tests/*.cc)
-
-libstore-test-support_CXXFLAGS += $(libstore-tests_EXTRA_INCLUDES)
-
-libstore-test-support_LIBS = \
-    libutil-test-support \
-    libstore libutil
-
-libstore-test-support_LDFLAGS := $(THREAD_LDFLAGS) -lrapidcheck
diff --git a/tests/unit/libstore/local.mk b/tests/unit/libstore/local.mk
deleted file mode 100644
index 8d3d6b0af..000000000
--- a/tests/unit/libstore/local.mk
+++ /dev/null
@@ -1,38 +0,0 @@
-check: libstore-tests_RUN
-
-programs += libstore-tests
-
-libstore-tests_NAME = libnixstore-tests
-
-libstore-tests_ENV := _NIX_TEST_UNIT_DATA=$(d)/data GTEST_OUTPUT=xml:$$testresults/libstore-tests.xml
-
-libstore-tests_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libstore-tests_INSTALL_DIR := $(checkbindir)
-else
-  libstore-tests_INSTALL_DIR :=
-endif
-
-libstore-tests_SOURCES := $(wildcard $(d)/*.cc)
-
-libstore-tests_EXTRA_INCLUDES = \
-    -I tests/unit/libstore-support \
-    -I tests/unit/libutil-support \
-    $(INCLUDE_libstore) \
-    $(INCLUDE_libstorec) \
-    $(INCLUDE_libutil) \
-    $(INCLUDE_libutilc)
-
-libstore-tests_CXXFLAGS += $(libstore-tests_EXTRA_INCLUDES)
-
-libstore-tests_LIBS = \
-    libstore-test-support libutil-test-support \
-    libstore libstorec libutil libutilc
-
-libstore-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)
-
-ifdef HOST_WINDOWS
-  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
-  libstore-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
-endif
diff --git a/tests/unit/libutil-support/local.mk b/tests/unit/libutil-support/local.mk
deleted file mode 100644
index 5f7835c9f..000000000
--- a/tests/unit/libutil-support/local.mk
+++ /dev/null
@@ -1,19 +0,0 @@
-libraries += libutil-test-support
-
-libutil-test-support_NAME = libnixutil-test-support
-
-libutil-test-support_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libutil-test-support_INSTALL_DIR := $(checklibdir)
-else
-  libutil-test-support_INSTALL_DIR :=
-endif
-
-libutil-test-support_SOURCES := $(wildcard $(d)/tests/*.cc)
-
-libutil-test-support_CXXFLAGS += $(libutil-tests_EXTRA_INCLUDES)
-
-libutil-test-support_LIBS = libutil
-
-libutil-test-support_LDFLAGS := $(THREAD_LDFLAGS) -lrapidcheck
diff --git a/tests/unit/libutil/local.mk b/tests/unit/libutil/local.mk
deleted file mode 100644
index 404f35cf1..000000000
--- a/tests/unit/libutil/local.mk
+++ /dev/null
@@ -1,37 +0,0 @@
-check: libutil-tests_RUN
-
-programs += libutil-tests
-
-libutil-tests_NAME = libnixutil-tests
-
-libutil-tests_ENV := _NIX_TEST_UNIT_DATA=$(d)/data GTEST_OUTPUT=xml:$$testresults/libutil-tests.xml
-
-libutil-tests_DIR := $(d)
-
-ifeq ($(INSTALL_UNIT_TESTS), yes)
-  libutil-tests_INSTALL_DIR := $(checkbindir)
-else
-  libutil-tests_INSTALL_DIR :=
-endif
-
-libutil-tests_SOURCES := $(wildcard $(d)/*.cc)
-
-libutil-tests_EXTRA_INCLUDES = \
-    -I tests/unit/libutil-support \
-    $(INCLUDE_libutil) \
-    $(INCLUDE_libutilc)
-
-libutil-tests_CXXFLAGS += $(libutil-tests_EXTRA_INCLUDES)
-
-libutil-tests_LIBS = libutil-test-support libutil libutilc
-
-libutil-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)
-
-ifdef HOST_WINDOWS
-  # Increase the default reserved stack size to 65 MB so Nix doesn't run out of space
-  libutil-tests_LDFLAGS += -Wl,--stack,$(shell echo $$((65 * 1024 * 1024)))
-endif
-
-check: $(d)/data/git/check-data.sh.test
-
-$(eval $(call run-test,$(d)/data/git/check-data.sh))