diff --git a/programs/fileio.c b/programs/fileio.c
index ff3401b5..7cbf0280 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -1453,8 +1453,13 @@ FIO_compressFilename_srcFile(FIO_prefs_t* const prefs,
 
     ress.srcFile = FIO_openSrcFile(srcFileName);
     if (ress.srcFile == NULL) return 1;   /* srcFile could not be opened */
-    if (g_excludeCompressedFiles && !UTIL_isPrecompressedFile(srcFileName)) {  /* precompressed file (--exclude-compressed). DO NOT COMPRESS */
-        DISPLAYLEVEL(4, "Precompressed file: %s \n", srcFileName);
+
+    /* Check if "srcFile" is compressed. Only done if --exclude-compressed flag is used
+    * YES => ZSTD will not compress the file.
+    * NO => ZSTD will resume with compress operation.
+    */
+    if (g_excludeCompressedFiles && UTIL_isCompressedFile(srcFileName)) {  /* precompressed file (--exclude-compressed). DO NOT COMPRESS */
+        DISPLAYLEVEL(4, "File is already compressed : %s \n", srcFileName);
         fclose(ress.srcFile);
         ress.srcFile = NULL;
         return 0;
diff --git a/programs/util.c b/programs/util.c
index 830f2039..63e9ef9e 100644
--- a/programs/util.c
+++ b/programs/util.c
@@ -330,22 +330,21 @@ int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char
 YES => Skip the file (return 0)
 NO => return 1
 */
-int UTIL_isPrecompressedFile(const char *inputName)
+int UTIL_isCompressedFile(const char *inputName)
 {
-    return compareExtensions(inputName,compressedFileExtensions);
+    return compareExtensions(inputName,g_compressedFileExtensions);
 }
 
-int compareExtensions(const char* infilename, const char extensionList[4][10])
+int compareExtensions(const char* infilename, const char* extensionList[])
 {
-   int i=0;
-   //char* ext = strchr(infilename, '.');
-   for(i=0;i<4;i++)
+   while(*extensionList != NULL)
    {
-     char* ext = strstr(infilename,extensionList[i]);
+     const char* ext = strstr(infilename,extensionList[i]);
      if(ext)
-        return 0;
+        return 1;
+      ++extensionList;
    }
-   return 1;
+   return 0;
 }
 /*
  * UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories,
diff --git a/programs/util.h b/programs/util.h
index 0da6255c..deb70786 100644
--- a/programs/util.h
+++ b/programs/util.h
@@ -39,7 +39,7 @@ extern "C" {
 #endif
 #include <time.h>         /* clock_t, clock, CLOCKS_PER_SEC, nanosleep */
 #include "mem.h"          /* U32, U64 */
-
+#include "fileio.h"
 
 /*-************************************************************
 * Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW
@@ -128,7 +128,18 @@ extern int g_utilDisplayLevel;
 #endif
 
 int g_excludeCompressedFiles;
-static const char compressedFileExtensions[4][10] = {".zst",".gz",".xz",".lz4"};
+static const char *g_compressedFileExtensions[] = {
+    ZSTD_EXTENSION,
+    TZSTD_EXTENSION,
+    GZ_EXTENSION,
+    TGZ_EXTENSION,
+    LZMA_EXTENSION,
+    XZ_EXTENSION,
+    TXZ_EXTENSION,
+    LZ4_EXTENSION,
+    TLZ4_EXTENSION,
+    NULL
+};
 
 int UTIL_fileExist(const char* filename);
 int UTIL_isRegularFile(const char* infilename);
@@ -137,8 +148,8 @@ U32 UTIL_isDirectory(const char* infilename);
 int UTIL_getFileStat(const char* infilename, stat_t* statbuf);
 int UTIL_isSameFile(const char* file1, const char* file2);
 int UTIL_compareStr(const void *p1, const void *p2);
-int UTIL_isPrecompressedFile(const char* infilename);
-int compareExtensions(const char* infilename, const char extensionList[4][10]);
+int UTIL_isCompressedFile(const char* infilename);
+int compareExtensions(const char* infilename, const char *extensionList[]);
 
 U32 UTIL_isFIFO(const char* infilename);
 U32 UTIL_isLink(const char* infilename);
diff --git a/programs/zstdcli.c b/programs/zstdcli.c
index 11116afc..a704a1ab 100644
--- a/programs/zstdcli.c
+++ b/programs/zstdcli.c
@@ -118,7 +118,6 @@ static int usage(const char* programName)
 #endif
     DISPLAY( " -D file: use `file` as Dictionary \n");
     DISPLAY( " -o file: result stored into `file` (only if 1 input file) \n");
-    DISPLAY( "--exclude-compressed:  only compress files that are not previously compressed \n");
     DISPLAY( " -f     : overwrite output without prompting and (de)compress links \n");
     DISPLAY( "--rm    : remove source file(s) after successful de/compression \n");
     DISPLAY( " -k     : preserve source file(s) (default) \n");
@@ -137,6 +136,7 @@ static int usage_advanced(const char* programName)
     DISPLAY( " -q     : suppress warnings; specify twice to suppress errors too\n");
     DISPLAY( " -c     : force write to standard output, even if it is the console\n");
     DISPLAY( " -l     : print information about zstd compressed files \n");
+    DISPLAY( "--exclude-compressed:  only compress files that are not previously compressed \n");
 #ifndef ZSTD_NOCOMPRESS
     DISPLAY( "--ultra : enable levels beyond %i, up to %i (requires more memory)\n", ZSTDCLI_CLEVEL_MAX, ZSTD_maxCLevel());
     DISPLAY( "--long[=#]: enable long distance matching with given window log (default: %u)\n", g_defaultMaxWindowLog);
diff --git a/tests/playTests.sh b/tests/playTests.sh
index 9294bf81..ca286071 100755
--- a/tests/playTests.sh
+++ b/tests/playTests.sh
@@ -232,7 +232,6 @@ else
   println "Test is not successful"
 fi
 println "Test completed"
-sleep 5
 
 println "test : file removal"
 $ZSTD -f --rm tmp