diff --git a/src/test/fspp/fuse/createAndOpenFile/FuseCreateAndOpenFlagsTest.cpp b/src/test/fspp/fuse/createAndOpenFile/FuseCreateAndOpenFlagsTest.cpp
index 1b2ded24..3ba80def 100644
--- a/src/test/fspp/fuse/createAndOpenFile/FuseCreateAndOpenFlagsTest.cpp
+++ b/src/test/fspp/fuse/createAndOpenFile/FuseCreateAndOpenFlagsTest.cpp
@@ -6,7 +6,7 @@ using ::testing::WithParamInterface;
 using ::testing::Values;
 using ::testing::Return;
 
-class FuseCreateAndOpenFlagsTest: public FuseCreateAndOpenTest, public WithParamInterface<unsigned int> {
+class FuseCreateAndOpenFlagsTest: public FuseCreateAndOpenTest, public WithParamInterface<mode_t> {
 };
 INSTANTIATE_TEST_CASE_P(FuseCreateAndOpenFlagsTest, FuseCreateAndOpenFlagsTest, Values(O_RDWR, O_RDONLY, O_WRONLY));
 
diff --git a/src/test/fspp/fuse/createAndOpenFile/testutils/FuseCreateAndOpenTest.h b/src/test/fspp/fuse/createAndOpenFile/testutils/FuseCreateAndOpenTest.h
index 6997bab3..a2aa5b9e 100644
--- a/src/test/fspp/fuse/createAndOpenFile/testutils/FuseCreateAndOpenTest.h
+++ b/src/test/fspp/fuse/createAndOpenFile/testutils/FuseCreateAndOpenTest.h
@@ -1,6 +1,6 @@
 #pragma once
-#ifndef TEST_FSPP_FUSE_OPENFILE_TESTUTILS_FUSECREATEANDOPENTEST_H_
-#define TEST_FSPP_FUSE_OPENFILE_TESTUTILS_FUSECREATEANDOPENTEST_H_
+#ifndef TEST_FSPP_FUSE_CREATEANDOPENFILE_TESTUTILS_FUSECREATEANDOPENTEST_H_
+#define TEST_FSPP_FUSE_CREATEANDOPENFILE_TESTUTILS_FUSECREATEANDOPENTEST_H_
 
 #include "test/testutils/FuseTest.h"
 
diff --git a/src/test/fspp/fuse/truncate/FuseTruncateErrorTest.cpp b/src/test/fspp/fuse/truncate/FuseTruncateErrorTest.cpp
new file mode 100644
index 00000000..eaf53f0d
--- /dev/null
+++ b/src/test/fspp/fuse/truncate/FuseTruncateErrorTest.cpp
@@ -0,0 +1,27 @@
+#include "testutils/FuseTruncateTest.h"
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+
+#include "fspp/impl/FuseErrnoException.h"
+
+using ::testing::_;
+using ::testing::StrEq;
+using ::testing::Throw;
+using ::testing::WithParamInterface;
+using ::testing::Values;
+
+using namespace fspp;
+
+class FuseTruncateErrorTest: public FuseTruncateTest, public WithParamInterface<int> {
+};
+INSTANTIATE_TEST_CASE_P(FuseTruncateErrorTest, FuseTruncateErrorTest, Values(EACCES, EFAULT, EFBIG, EINTR, EINVAL, EIO, EISDIR, ELOOP, ENAMETOOLONG, ENOENT, ENOTDIR, EPERM, EROFS, ETXTBSY));
+
+TEST_P(FuseTruncateErrorTest, TruncateFile) {
+  ReturnIsFileOnLstat(FILENAME);
+  EXPECT_CALL(fsimpl, truncate(StrEq(FILENAME), _))
+    .Times(1).WillOnce(Throw(FuseErrnoException(GetParam())));
+
+  int fd = TruncateFileAllowError(FILENAME, 0);
+  EXPECT_EQ(GetParam(), errno);
+  EXPECT_EQ(-1, fd);
+}
diff --git a/src/test/fspp/fuse/truncate/FuseTruncateFilenameTest.cpp b/src/test/fspp/fuse/truncate/FuseTruncateFilenameTest.cpp
new file mode 100644
index 00000000..ff1c4857
--- /dev/null
+++ b/src/test/fspp/fuse/truncate/FuseTruncateFilenameTest.cpp
@@ -0,0 +1,38 @@
+#include "testutils/FuseTruncateTest.h"
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+
+
+using ::testing::_;
+using ::testing::StrEq;
+using ::testing::Return;
+
+class FuseTruncateFilenameTest: public FuseTruncateTest {
+};
+
+TEST_F(FuseTruncateFilenameTest, TruncateFile) {
+  ReturnIsFileOnLstat("/myfile");
+  EXPECT_CALL(fsimpl, truncate(StrEq("/myfile"), _))
+    .Times(1).WillOnce(Return());
+
+  TruncateFile("/myfile", 0);
+}
+
+TEST_F(FuseTruncateFilenameTest, TruncateFileNested) {
+  ReturnIsDirOnLstat("/mydir");
+  ReturnIsFileOnLstat("/mydir/myfile");
+  EXPECT_CALL(fsimpl, truncate(StrEq("/mydir/myfile"), _))
+    .Times(1).WillOnce(Return());
+
+  TruncateFile("/mydir/myfile", 0);
+}
+
+TEST_F(FuseTruncateFilenameTest, TruncateFileNested2) {
+  ReturnIsDirOnLstat("/mydir");
+  ReturnIsDirOnLstat("/mydir/mydir2");
+  ReturnIsFileOnLstat("/mydir/mydir2/myfile");
+  EXPECT_CALL(fsimpl, truncate(StrEq("/mydir/mydir2/myfile"), _))
+    .Times(1).WillOnce(Return());
+
+  TruncateFile("/mydir/mydir2/myfile", 0);
+}
diff --git a/src/test/fspp/fuse/truncate/FuseTruncateSizeTest.cpp b/src/test/fspp/fuse/truncate/FuseTruncateSizeTest.cpp
new file mode 100644
index 00000000..b4a43478
--- /dev/null
+++ b/src/test/fspp/fuse/truncate/FuseTruncateSizeTest.cpp
@@ -0,0 +1,23 @@
+#include "testutils/FuseTruncateTest.h"
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+
+
+using ::testing::_;
+using ::testing::StrEq;
+using ::testing::Return;
+using ::testing::WithParamInterface;
+using ::testing::Values;
+
+class FuseTruncateSizeTest: public FuseTruncateTest, public WithParamInterface<off_t> {
+};
+INSTANTIATE_TEST_CASE_P(FuseTruncateSizeTest, FuseTruncateSizeTest, Values(0, 1, 10, 1024, 1024*1024*1024));
+
+
+TEST_P(FuseTruncateSizeTest, TruncateFile) {
+  ReturnIsFileOnLstat(FILENAME);
+  EXPECT_CALL(fsimpl, truncate(StrEq(FILENAME), GetParam()))
+    .Times(1).WillOnce(Return());
+
+  TruncateFile(FILENAME, GetParam());
+}
diff --git a/src/test/fspp/fuse/truncate/testutils/FuseTruncateTest.cpp b/src/test/fspp/fuse/truncate/testutils/FuseTruncateTest.cpp
new file mode 100644
index 00000000..d7753899
--- /dev/null
+++ b/src/test/fspp/fuse/truncate/testutils/FuseTruncateTest.cpp
@@ -0,0 +1,13 @@
+#include "FuseTruncateTest.h"
+
+void FuseTruncateTest::TruncateFile(const char *filename, off_t size) {
+  int retval = TruncateFileAllowError(filename, size);
+  EXPECT_EQ(0, retval);
+}
+
+int FuseTruncateTest::TruncateFileAllowError(const char *filename, off_t size) {
+  auto fs = TestFS();
+
+  auto realpath = fs->mountDir() / filename;
+  return ::truncate(realpath.c_str(), size);
+}
diff --git a/src/test/fspp/fuse/truncate/testutils/FuseTruncateTest.h b/src/test/fspp/fuse/truncate/testutils/FuseTruncateTest.h
new file mode 100644
index 00000000..33666846
--- /dev/null
+++ b/src/test/fspp/fuse/truncate/testutils/FuseTruncateTest.h
@@ -0,0 +1,15 @@
+#pragma once
+#ifndef TEST_FSPP_FUSE_TRUNCATE_TESTUTILS_FUSETRUNCATETEST_H_
+#define TEST_FSPP_FUSE_TRUNCATE_TESTUTILS_FUSETRUNCATETEST_H_
+
+#include "test/testutils/FuseTest.h"
+
+class FuseTruncateTest: public FuseTest {
+public:
+  const char *FILENAME = "/myfile";
+
+  void TruncateFile(const char *filename, off_t size);
+  int TruncateFileAllowError(const char *filename, off_t size);
+};
+
+#endif