diff --git a/src/libexpr/tests/derived-path.cc b/src/libexpr/tests/derived-path.cc
index 82d0f7076..8210efef2 100644
--- a/src/libexpr/tests/derived-path.cc
+++ b/src/libexpr/tests/derived-path.cc
@@ -10,7 +10,6 @@ namespace nix {
 // Testing of trivial expressions
 class DerivedPathExpressionTest : public LibExprTest {};
 
-#if 0
 // FIXME: `RC_GTEST_FIXTURE_PROP` isn't calling `SetUpTestSuite` because it is
 // no a real fixture.
 //
@@ -62,6 +61,5 @@ RC_GTEST_FIXTURE_PROP(
     };
     RC_ASSERT(DerivedPath { b } == d);
 }
-#endif
 
 } /* namespace nix */
diff --git a/src/libexpr/tests/value/context.cc b/src/libexpr/tests/value/context.cc
index 377b04a25..0d9381577 100644
--- a/src/libexpr/tests/value/context.cc
+++ b/src/libexpr/tests/value/context.cc
@@ -111,7 +111,6 @@ Gen<NixStringContextElem> Arbitrary<NixStringContextElem>::arbitrary()
 
 namespace nix {
 
-#if 0
 RC_GTEST_PROP(
     NixStringContextElemTest,
     prop_round_rip,
@@ -119,6 +118,5 @@ RC_GTEST_PROP(
 {
     RC_ASSERT(o == NixStringContextElem::parse(o.to_string()));
 }
-#endif
 
 }
diff --git a/src/libstore/tests/derived-path.cc b/src/libstore/tests/derived-path.cc
index f713d02c3..160443ec1 100644
--- a/src/libstore/tests/derived-path.cc
+++ b/src/libstore/tests/derived-path.cc
@@ -49,7 +49,6 @@ class DerivedPathTest : public LibStoreTest
 // no a real fixture.
 //
 // See https://github.com/emil-e/rapidcheck/blob/master/doc/gtest.md#rc_gtest_fixture_propfixture-name-args
-#if 0
 TEST_F(DerivedPathTest, force_init)
 {
 }
@@ -69,6 +68,5 @@ RC_GTEST_FIXTURE_PROP(
 {
     RC_ASSERT(o == DerivedPath::parse(*store, o.to_string(*store)));
 }
-#endif
 
 }
diff --git a/src/libstore/tests/outputs-spec.cc b/src/libstore/tests/outputs-spec.cc
index f5f492d39..bf8deaa9d 100644
--- a/src/libstore/tests/outputs-spec.cc
+++ b/src/libstore/tests/outputs-spec.cc
@@ -224,7 +224,6 @@ Gen<OutputsSpec> Arbitrary<OutputsSpec>::arbitrary()
 
 namespace nix {
 
-#if 0
 RC_GTEST_PROP(
     OutputsSpec,
     prop_round_rip,
@@ -232,6 +231,5 @@ RC_GTEST_PROP(
 {
     RC_ASSERT(o == OutputsSpec::parse(o.to_string()));
 }
-#endif
 
 }
diff --git a/src/libstore/tests/path.cc b/src/libstore/tests/path.cc
index 5348b53f9..430aa0099 100644
--- a/src/libstore/tests/path.cc
+++ b/src/libstore/tests/path.cc
@@ -134,7 +134,6 @@ Gen<StorePath> Arbitrary<StorePath>::arbitrary()
 
 namespace nix {
 
-#if 0
 RC_GTEST_FIXTURE_PROP(
     StorePathTest,
     prop_regex_accept,
@@ -150,6 +149,5 @@ RC_GTEST_FIXTURE_PROP(
 {
     RC_ASSERT(p == store->parseStorePath(store->printStorePath(p)));
 }
-#endif
 
 }